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ics for communications four channel codec filter sicofi ? -4 peb 2465 version 2.3 data sheet 02.97 t2465-xv23-d1-7600
edition 02.97 this edition was realized using the software system framemaker a . published by siemens ag, bereich halbleiter, marketing- kommunikation, balanstra?e 73, 81541 mnchen siemens ag 1997. all rights reserved. attention please! as far as patents or other rights of third par- ties are concerned, liability is only assumed for components, not for applications, pro- cesses and circuits implemented within com- ponents or assemblies. the information describes the type of compo- nent and shall not be considered as assured characteristics. terms of delivery and rights to change design reserved. for questions on technology, delivery and prices please contact the semiconductor group offices in germany or the siemens companies and representatives worldwide (see address list). due to technical requirements components may contain dangerous substances. for in- formation on the types in question please contact your nearest siemens office, semi- conductor group. siemens ag is an approved cecc manufac- turer. packing please use the recycling operators known to you. we can also help you C get in touch with your nearest sales office. by agreement we will take packing material back, if it is sorted. you must bear the costs of transport. for packing material that is returned to us un- sorted or which we are not obliged to accept, we shall have to invoice you for any costs in- curred. components used in life-support devices or systems must be expressly authorized for such purpose! critical components 1 of the semiconductor group of siemens ag, may only be used in life-support devices or systems 2 with the ex- press written approval of the semiconductor group of siemens ag. 1 a critical component is a component used in a life-support device or system whose failure can reasonably be expected to cause the failure of that life-support de- vice or system, or to affect its safety or ef- fectiveness of that device or system. 2 life support devices or systems are in- tended (a) to be implanted in the human body, or (b) to support and/or maintain and sustain human life. if they fail, it is reasonable to assume that the health of the user may be endangered.
peb 2465 revision history: current version: 02.97 previous versions: 12.92; 10.93 last revision data sheet 06.95 page (in last revision) subjects (regarding, data sheet 06.95, for v2.1) 20 default tone-generator frequencies changed to values implemented 21 version was changed for version v2.* 21, 22, 23 names of loops and cut-offs have been adjusted to figure on page 33 23 alb-256 was removed from data sheet 23 description of high-pass behavior added 24, 25 there is an individual coefficient set per channel also for frx, frr, im-filters and tone-generators 31 a functional connection between two neighboring channels no longer exists 35, 37 chapter about programmable filters and qsicos included 38 testconditions have been clarified 38 the guaranteed programming range was adjusted for version 2.* 38 absolute gain values, and imd-values have been adjusted 41 out of band signals at analog output: new figure 42 new spec. item: out of band idle channel noise 45 transhybrid loss at two additional frequencies 46 power supply and operating current values have been corrected 47 behavior of the reset-pin 47 input characteristics for digital pins has changed 48, 49 iom-2 interface: timing clarified 62 boundary scan identification number changed for version v2 62, 63, 64 description of level metering function 67 capacitance on v ref -pins is changed to 220 nf 68 board layout recommendations added features which are not necessary/useful for customers have been taken out from the data-sheet: fusing, digital block testing, additional test features
peb 2465 revision history: current version: 02.97 previous versions: 12.92; 10.93 data sheet 06.95 (for v2.1) last revision data sheet 07.96 page (in current version) changed items, clarifications, supplements and updates (regarding data sheet 07.96) 3 footnote added to the pins v dda12 and v dda34 , reference added to footnote for filter-capacitors 22 ax1 and ax2 exchanged, in figure cut offs and loops 23 names of highpasses hpr and hpx updated 26 xop command description updated 36 figure in chapter qsicos clarified 38 test conditions updated 48 analog output load-spec added 64 figure updated (ax1 and ax2 exchanged) 66 command description updated 69 layout-figure updated
peb 2465 table of contents page semiconductor group 5 02.97 1 general description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1.1 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 1.2 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 1.3 pin definition and functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2 functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.1 sicofi ? -4 principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2.2 iom ? -2 interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 3 programming the sicofi ? -4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 3.1 types of monitor bytes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3.2 storage of programming information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3.3 sicofi ? -4 commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 3.3.1 sop C write commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 3.3.2 xop C write commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 3.3.3 cop C write commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 3.3.4 sop C read commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 3.3.5 xop C read commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 3.3.6 cop C read commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 3.3.7 example for a mixed command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 3.4 sop command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 3.4.1 cr1 configuration register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 3.4.2 cr2 configuration register 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 3.4.3 cr3 configuration register 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 3.4.4 cr4 configuration register 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 3.5 cop command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 3.6 how to program the filter coefficients . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 3.7 xop command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 3.7.1 xr1 extended register 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 3.7.2 xr2 extended register 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 3.7.3 xr3 extended register 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 3.7.4 xr4 extended register 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 4 slic interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 4.1 iom ? -2 interface command/indication byte . . . . . . . . . . . . . . . . . . . . . . . . 41 4.2 data-downstream c/i channel byte format (receive) . . . . . . . . . . . . . . . . . 41 4.3 data-upstream c/i channel byte format (transmit) . . . . . . . . . . . . . . . . . . 41 5 operating modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 5.1 reset (basic setting mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 5.2 standby mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 5.3 operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
peb 2465 table of contents page semiconductor group 6 02.97 6 programmable filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 6.1 impedance matching filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 6.2 transhybrid balancing (th) filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 6.3 filters for frequency response correction . . . . . . . . . . . . . . . . . . . . . . . . . 46 6.4 amplification/attenuation-filters ax1, ax2, ar1, ar2 . . . . . . . . . . . . . . . . 47 6.5 amplification/attenuation receive (ar1, ar2)-filter . . . . . . . . . . . . . . . . . . 47 6.6 amplification/attenuation transmit (ax1, ax2)-filter . . . . . . . . . . . . . . . . . 47 7 qsicos software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 7.1 qsicos supports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 8 transmission characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 8.1 frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 8.2 group delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 8.3 out-of-band signals at analog input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 8.4 out-of-band signals at analog output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 8.5 out of band idle channel noise at analog output . . . . . . . . . . . . . . . . . . . . 57 8.6 overload compression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 8.7 gain tracking (receive or transmit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 8.8 total distortion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 8.8.1 total distortion measured with sine wave . . . . . . . . . . . . . . . . . . . . . . . . . 58 8.8.2 total distortion measured with noise according to ccitt . . . . . . . . . . . . . 59 8.9 single frequency distortion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 8.10 transhybrid loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 9 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 9.1 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 9.2 operating range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 9.3 digital interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 9.4 analog interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 9.5 reset timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 9.6 iom ? -2 interface timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 9.6.1 4 mhz operation mode (mode = 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 9.6.2 2 mhz operation mode (mode = 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 9.7 iom ? -2 command/indication interface timing . . . . . . . . . . . . . . . . . . . . . . . 66 9.7.1 4 mhz operation mode (mode = 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 9.7.2 2 mhz operation mode (mode = 0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 9.8 detector select timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
peb 2465 table of contents page semiconductor group 7 02.97 10 appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 10.1 iom ? -2 interface monitor transfer protocol . . . . . . . . . . . . . . . . . . . . . . . . . 69 10.1.1 monitor channel operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 10.1.2 monitor handshake procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 10.1.3 state diagram of the sicofi ? -4 monitor transmitter . . . . . . . . . . . . . . . . . 71 10.1.4 state diagram of the sicofi ? -4 monitor receiver . . . . . . . . . . . . . . . . . . . 72 10.1.5 monitor channel data structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 10.2 iom ? -2 interface programming procedure . . . . . . . . . . . . . . . . . . . . . . . . . 74 10.3 test features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 10.3.1 boundary scan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 10.3.2 the tap-controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 10.3.3 level metering function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 10.3.4 using the level metering function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 10.4 programming the sicofi ? -4 tone generators . . . . . . . . . . . . . . . . . . . . . . 84 11 proposed test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 12 board layout recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 12.1 board layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 12.2 filter capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 13 package outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 iom , iom -1, iom -2, sicofi , sicofi -2, sicofi -4 and sicofi -4 m c, are registered trademarks of siemens ag.
peb 2465 general description semiconductor group 8 02.97 1 general description the four channel codec filter peb 2465 sicofi-4 is the logic continuation of a well-established family of siemens codec-filter-ics. the sicofi-4 is a fully integrated pcm codec and filter fabricated in low power 1 m cmos technology for applications in digital communication systems. based on an advanced digital filter concept, the peb 2465 provides excellent transmission performance and high flexibility. the new filter concept (second generation) lends to a maximum of independence between the different filter blocks. each filter block can be seen like an one to one representative of the corresponding network element. only very few external components are needed, to complete the functionality of the sicofi-4. the internal level accuracy is based on a very accurate bandgap reference. the frequency behavior is mainly determined by digital filters, which do not have any fluctuations. as a result of the new adc - and dac - concepts linearity is only limited by second order parasitic effects. although the device works with only one single 5 v supply there is a very good dynamic range available.
p-mqfp-64 semiconductor group 9 02.97 four channel codec filter sicofi ? -4 peb 2465 version 2.3 cmos type ordering code package peb 2465 h v2.3 on request p-mqfp-64 1.1 features ? single chip codec and filter to handle four co- or pabx-channels ? specification according to relevant ccitt, eia and lssgr recommendations ? digital signal processing technique ? programmable interface optimized to current feed slics and transformer solutions ? four pin serial iom-2 interface ? single power supply 5 v ? advanced low power 1 m m analog cmos technology ? standard 64 pin p-mqfp-64 package ? high performance analog to digital conversion ? high performance digital to analog conversion ? programmable digital filters to adapt the transmission behavior especially for C ac impedance matching C transhybrid balancing C frequency response C gain ? advanced test capabilities C all digital pins can be tested within a boundary scan scheme (ieee 1149.1) C five digital loops C four analog loops C two programmable tone generators per channel ? comprehensive development platform available C software for automatic filter coefficient calculation - qsicos C hardware development board - stut 2465
peb 2465 general description semiconductor group 10 02.97 1.2 pin configuration (top view) figure 1 p-mqfp-64
peb 2465 general description semiconductor group 11 02.97 1.3 pin definition and functions pin no. symbol input (i) output (o) function common pins for all channels 23 v ddd i + 5 v supply for the digital circuitry 1) 58 gndd i ground digital, not internally connected to gnda 1, 2, 3, 4 all digital signals are referred to this pin 40 v dda12 i + 5 v analog supply voltage for channel 1 and 2 1) 9 v dda34 i + 5 v analog supply voltage for channel 3 and 4 1) 27 fsc i iom-2: frame synchronization clock , 8 khz 26 dcl i iom-2: data clock, 2048 khz or 4096 khz depending on mode 25 du o iom-2: data upstream, open drain output 24 dd i iom-2: data downstream, input 22 reset i reset input - forces the device to the default mode, active high 57 mode i iom-2: mode selection 60 tss0 i iom-2: time slot selection pin 0 59 tss1 i iom-2: time slot selection pin 1 56 tck i boundary scan: test clock 55 tms i boundary scan: test mode select 54 tdi i boundary scan: test data input 53 tdo o boundary scan: test data output 28 lgkm0 o loop/ground key multiplexing output 0 for channel 1, 2 21 lgkm1 o loop/ground key multiplexing output 1 for channel 3, 4 41 v h12 i/o reference voltage for channel 1 and 2, has to be connected via a 220 nf cap. to ground 8 v h34 i/o reference voltage for channel 3 and 4, has to be connected via a 220 nf cap. to ground 1) a 100 nf cap. should be used for blocking these pins, see also on page 87 .
peb 2465 general description semiconductor group 12 02.97 specific pins for channel 1 38 gnda1 i ground analog for channel 1, not internally connected to gndd or gnda 2, 3, 4 39 v in1 i analog voice (voltage) input for channel 1 37 v out1 o analog voice (voltage) output for channel 1 31 si1_0 i signaling indication input pin 0 for channel 1 30 si1_1 i signaling indication input pin 1 for channel 1 29 si1_2 i signaling indication input pin 2 for channel 1 36 so1_0 o signaling command output pin 0 for channel 1 35 so1_1 o signaling command output pin 1 for channel 1 34 so1_2 o signaling command output pin 2 for channel 1 33 sb1_0 i/o bi-directional signal. command indication pin 0 for channel 1 32 sb1_1 i/o bi-directional signal. command indication pin 1 for channel 1 specific pins for channel 2 43 gnda2 i ground analog for channel 2, not internally connected to gndd or gnda 1, 3, 4 42 v in2 i analog voice (voltage) input for channel 2 44 v out2 o analog voice (voltage) output for channel 2 50 si2_0 i signaling indication input pin 0 for channel 2 51 si2_1 i signaling indication input pin 1 for channel 2 52 si2_2 i signaling indication input pin 2 for channel 2 45 so2_0 o signaling command output pin 0 for channel 2 46 so2_1 o signaling command output pin 1 for channel 2 47 so2_2 o signaling command output pin 2 for channel 2 48 sb2_0 i/o bi-directional signal. command indication pin 0 for channel 2 49 sb2_1 i/o bi-directional signal. command indication pin 1 for channel 2 1.3 pin definition and functions (contd) pin no. symbol input (i) output (o) function
peb 2465 general description semiconductor group 13 02.97 specific pins for channel 3 6 gnda3 i ground analog for channel 3, not internally connected to gndd or gnda1, 2, 4 7 v in3 i analog voice (voltage) input for channel 3 5 v out3 o analog voice (voltage) output for channel 3 63 si3_0 i signaling indication input pin 0 for channel 3 62 si3_1 i signaling indication input pin 1 for channel 3 61 si3_2 i signaling indication input pin 2 for channel 3 4 so3_0 o signaling command output pin 0 for channel 3 3 so3_1 o signaling command output pin 1 for channel 3 2 so3_2 o signaling command output pin 2 for channel 3 1 sb3_0 i/o bi-directional signal. command indication pin 0 for channel 3 64 sb3_1 i/o bi-directional signal. command indication pin 1 for channel 3 specific pins for channel 4 11 gnda4 i ground analog for channel 4, not internally connected to gndd or gnda1,2,3 10 v in4 i analog voice (voltage) input for channel 4 12 v out4 o analog voice (voltage) output for channel 4 18 si4_0 i signaling indication input pin 0 for channel 4 19 si4_1 i signaling indication input pin 1 for channel 4 20 si4_2 i signaling indication input pin 2 for channel 4 13 so4_0 o signaling command output pin 0 for channel 4 14 so4_1 o signaling command output pin 1 for channel 4 15 so4_2 o signaling command output pin 2 for channel 4 16 sb4_0 i/o bi-directional signal. command indication pin 0 for channel 4 17 sb4_1 i/o bi-directional signal. command indication pin 1 for channel 4 1.3 pin definition and functions (contd) pin no. symbol input (i) output (o) function
peb 2465 functional description semiconductor group 14 02.97 2 functional description 2.1 sicofi ? -4 principles the change from 2 m m to 1 m m cmos process requires new concepts in the realization of the analog functions. high performance (in the terms of gain, speed, stability ? ) 1 m m cmos devices can not withstand more than 5.5 v of supply-voltage. on that account the negative supply voltage v ss of the previous sicofi ? s will be omitted. this is a benefit for the user but it makes a very high demand on the analog circuitry. adc and dac are changed to sigma-delta-concepts to fulfill the stringent requirements on the dynamic parameters. using 1 m m cmos does not only lend to problems - it is the only acceptable solution in terms of area and power consumption for the integration of more then two sicofi channels on a single chip. it is rather pointless to implement 4 codec-filter-channels on one chip with pure analog circuitry. the use of a dsp-concept (the sicofi ? and the sicofi ? -2-approach) for this function seems to be a must for an adequate four channel architecture. figure 2 sicofi ? -4 signal flow graph (for either channel)
peb 2465 functional description semiconductor group 15 02.97 transmit path the analog input signal has to be dc-free connected by an external capacitor because there is an internal virtual reference ground potential. after passing a simple antialiasing prefilter (prefi) the voice signal is converted to a 1-bit digital data stream in the sigma-delta-converter. the first downsampling steps are done in fast running digital hardware filters. the following steps are implemented in the micro-code which has to be executed by the central digital signal processor. this dsp-machine is able to handle the workload for all four channels. at the end the fully processed signal (flexibly programmed in many parameters) is transferred to the iom-2 interface in a pcm-compressed signal representation. receive path the digital input signal is received via the iom-2 interface. expansion, pcm-law-pass-filtering, gain correction and frequency response correction are the next steps which are done by the dsp-machine. the upsampling interpolation steps are again processed by fast hardware structures to reduce the dsp-workload. the upsampled 1-bit data stream is then converted to an analog equivalent which is smoothed by a post-filter (pofi). as the signal v out is also referenced to an internal virtual ground potential, an external capacitor is required for dc-decoupling. loops there are two loops implemented. the first is to generate the ac-input impedance (im) and the second is to perform a proper hybrid balancing (th). a simple extra path im2 (from the transmit to the receive path) supports the impedance matching function. test features there are four analog and five digital test loops implemented in the sicofi-4. for special tests it is possible to cut off the receive and the transmit path at two different points.
peb 2465 functional description semiconductor group 16 02.97 figure 3 sicofi ? -4 block diagram the sicofi-4 bridges the gap between analog and digital voice signal transmission in modern telecommunication systems. high performance oversampling analog-to-digital converters (adc) and digital-to-analog converters (dac) provide the required conversion accuracy. analog antialiasing prefilters (prefi) and smoothing postfilters (pofi) are included. the connection between the adc and the dac (with high sampling rate) and the dsp, is done by specific hardware filters, for filtering like interpolation and decimation. the dedicated digital signal processor (dsp) handles all the algorithms necessary e.g. for pcm bandpass filtering, sample rate conversion and pcm companding. the iom-2 interface handles digital voice transmission, sicofi-4 feature control and transparent access to the sicofi-4 command and indication pins. to program the filters, precalculated sets of coefficients are downloaded from the system to the on chip coefficient ram (cram).
peb 2465 functional description semiconductor group 17 02.97 2.2 iom ? -2 interface the iom-2 interface consists of two data lines and two clock lines. du (data upstream) carries data from the sicofi-4 to a master device. this master device performs the interface between the pcm-backplane, the m -controller and up to 24 sicofi-4s. dd (data downstream) carries data from the master device to the sicofi-4. a frame synchronization clock signal (8 khz, fsc) as well as a data clock signal (2048 khz or 4096 khz dcl) has to be supplied to the sicofi-4. the sicofi-4 handles data as described in the iom-2 specification for analog devices. figure 4 iom ? -2 interface timing for 16 voice channels (per 8 khz frame)
peb 2465 functional description semiconductor group 18 02.97 figure 5 iom ? -2 interface timing (dcl = 4096 khz, mode = 1, per 8 khz frame)
peb 2465 functional description semiconductor group 19 02.97 figure 6 iom ? -2 interface timing (dcl = 2048 khz, mode = 0) iom ? -2 timeslot selection the four channels of each sicofi-4 can be assigned to 4 pairs of timeslots by pin-strapping the pins tss0 and tss1. (ts0 + ts1, ts2 + ts3, ts4 + ts5, ts6 + ts7). the iom-2 operating mode is selected by the mode pin. table 1 tss1 tss0 mode iom ? -2 operating mode 0 0 1 timeslot 0 + 1; dcl = 4096 khz 0 1 1 timeslot 2 + 3; dcl = 4096 khz 1 0 1 timeslot 4 + 5; dcl = 4096 khz 1 1 1 timeslot 6 + 7; dcl = 4096 khz 0 0 0 timeslot 0 + 1; dcl = 2048 khz 0 1 0 timeslot 2 + 3; dcl = 2048 khz 1 0 0 timeslot 4 + 5; dcl = 2048 khz 1 1 0 timeslot 6 + 7; dcl = 2048 khz
peb 2465 functional description semiconductor group 20 02.97 each iom-timeslot contains 2 voice channels (a and b). those two voice channels share a common iom-monitor-byte as well as a common c/i-byte. the ad-bit in the monitor command defines which of the two voice channels should be affected (programmed). (for more information on iom-2 specific monitor channel data structure see appendix, page 73 ). figure 7 in the following sections, only sicofi-4 channels 1 and 2 are discussed. channel 3 and channel 4 behave accordingly. table 2 sicofi ? -4 channels tss1 = 0, tss0 = 0 tss1 = 0, tss0 = 1 tss1 = 1, tss0 = 0 tss1 = 1, tss0 = 1 ts voice channel ts voice channel ts voice channel ts voice channel 1 ts0 a ts2 a ts4 a ts6 a 2 ts0 b ts2 b ts4 b ts6 b 3 ts1 a ts3 a ts5 a ts7 a 4 ts1 b ts3 b ts5 b ts7 b
peb 2465 programming the sicofi ? -4 semiconductor group 21 02.97 3 programming the sicofi ? -4 with the appropriate commands, the sicofi-4 can be programmed and verified very flexibly via the iom-2 interface monitor channel. data transfer to the sicofi-4 starts with a sicofi-specific address byte (81 h ). with the second byte one of 3 different types of commands (sop, xop and cop) is selected. each of those can be used as a write or read command. due to the extended sicofi-4 feature control facilities, sop, cop and xop commands contain additional information (e.g. number of subsequent bytes) for programming (write) and verifying (read) the sicofi-4 status. a write command is followed by up to 8 bytes of data. the sicofi-4 responds to a read command with its iom-2 specific address and the requested information, that is up to 8 bytes of data (see programming procedure, page 74 ). attention: each byte on the monitor channel, has to be sent twice at least, according to the iom-2 monitor handshake procedure. (for more information on iom-2 specific monitor channel data structure see appendix, page 73 ).
peb 2465 programming the sicofi ? -4 semiconductor group 22 02.97 3.1 types of monitor bytes the 8-bit monitor bytes have to be interpreted as either commands or status information stored in configuration registers or the coefficient ram. there are three different types of sicofi-4 commands which are selected by bit 3 and 4 as shown below. sop status operation: sicofi-4 status setting/monitoring xop extended operation: c/i channel configuration/evaluation cop coefficient operation: filter coefficient setting/monitoring 3.2 storage of programming information 4 configuration registers per channel: cr1, cr2, cr3, cr4 accessed by sop commands 4 common configuration registers: xr1, xr2, xr3 and xr4 accessed by xop commands (the contents are valid for two voice channels i.e. 1 iom-2 timeslot) 1 coefficient ram per channel: cram accessed by cop commands bit76543210 10 bit76543210 x11 bit76543210 0
peb 2465 programming the sicofi ? -4 semiconductor group 23 02.97 3.3 sicofi ? -4 commands 3.3.1 sop C write commands dd 76543210 bit76543210 du address 10000001 idle sop-write 1 byte 0 10001 idle cr1 data idle dd 76543210 bit76543210 du address 10000001 idle sop-write 2 bytes 0 10010 idle cr2 data idle cr1 data idle dd 76543210 bit76543210 du address 10000001 idle sop-write 3 bytes 0 10011 idle cr3 data idle cr2 data idle cr1 data idle dd 76543210 bit76543210 du address 10000001 idle sop-write 4 bytes 0 10100 idle cr4 data idle cr3 data idle cr2 data idle cr1 data idle
peb 2465 programming the sicofi ? -4 semiconductor group 24 02.97 3.3.2 xop C write commands 3.3.3 cop C write commands dd 76543210 bit76543210 du address 10000001 idle xop-write 2 bytes 0 11010 idle xr2 data idle xr1 data idle dd 76543210 bit76543210 du address 10000001 idle xop-write 3 bytes 0 11010 idle xr3 data idle xr2 data idle xr1 data idle dd 76543210 bit76543210 du address 10000001 idle cop-write 4 bytes 0 0 1 idle coeff. 4 data idle coeff. 3 data idle coeff. 2 data idle coeff. 1 data idle dd 76543210 bit76543210 du address 10000001 idle cop-write 8 bytes 0 0 0 idle coeff. 8 data idle coeff. 7 data idle coeff. 6 data idle coeff. 5 data idle coeff. 4 data idle coeff. 3 data idle coeff. 2 data idle coeff. 1 data idle
peb 2465 programming the sicofi ? -4 semiconductor group 25 02.97 3.3.4 sop C read commands dd 76543210 bit76543210 du address 10000001 idle sop-read 1 byte 1 10001 idle idle 10000001 address idle data cr1 dd 76543210 bit76543210 du address 10000001 idle sop-read 2 bytes 1 10010 idle idle 10000001 address idle data cr2 idle data cr1 dd 76543210 bit76543210 du address 10000001 idle sop-read 3 bytes 1 10011 idle idle 10000001 address idle data cr3 idle data cr2 idle data cr1 dd 76543210 bit76543210 du address 10000001 idle sop-read 4 bytes 1 10100 idle idle 10000001 address idle data cr4 idle data cr3 idle data cr2 idle data cr1
peb 2465 programming the sicofi ? -4 semiconductor group 26 02.97 3.3.5 xop C read commands dd 76543210 bit76543210 du address 10000001 idle xop-read 1 byte 1 11001 idle idle 10000001 address idle data xr1 dd 76543210 bit76543210 du address 10000001 idle xop-read 2 bytes 1 11010 idle idle 10000001 address idle data xr2 idle data xr1 dd 76543210 bit76543210 du address 10000001 idle xop-read 3 bytes 1 11011 idle idle 10000001 address idle data xr3 idle data xr2 idle data xr1
peb 2465 programming the sicofi ? -4 semiconductor group 27 02.97 3.3.6 cop C read commands dd 76543210 bit76543210 du address 10000001 idle cop-read 4 bytes 1 0 1 idle idle 10000001 address idle data coeff. 4 idle data coeff. 3 idle data coeff. 2 idle data coeff. 1 dd 76543210 bit76543210 du address 10000001 idle cop-read 8 bytes 1 0 0 idle idle 10000001 address idle data coeff. 8 idle data coeff. 7 idle data coeff. 6 idle data coeff. 5 idle data coeff. 4 idle data coeff. 3 idle data coeff. 2 idle data coeff. 1
peb 2465 programming the sicofi ? -4 semiconductor group 28 02.97 3.3.7 example for a mixed command dd 76543210 bit76543210 du address 10000001 idle sop-write 4 bytes 0 10100 idle cr4 data idle cr3 data idle cr2 data idle cr1 data idle xop-write 2 bytes 0 11010 idle xr2 data idle xr1 data idle cop-write 4 bytes 0 0 1 idle coeff. 4 data idle coeff. 3 data idle coeff. 2 data idle coeff. 1 data idle sop-read 3 bytes 1 10011 idle idle 10000001 address idle data cr3 idle data cr2 idle data cr1 address 10000001 idle cop-read 4 bytes 1 0 1 idle idle 10000001 address idle data coeff. 4 idle data coeff. 3 idle data coeff. 2 idle data coeff. 1 address 10000001 idle xop-read 1 byte 1 11001 idle idle 10000001 address idle data xr1
peb 2465 programming the sicofi ? -4 semiconductor group 29 02.97 3.4 sop command to modify or evaluate the sicofi-4 status, the contents of up to four configuration registers cr1, cr2, cr3 and cr4 may be transferred to or from the sicofi-4. this is started by a sop-command (status operation command). ad address information ad = 0 sicofi-4 channel 1(3) is addressed with this command ad = 1 sicofi-4 channel 2(4) is addressed with this command rw read/write information: enables reading from the sicofi-4 or writing information to the sicofi-4 rw = 0 write to sicofi-4 rw = 1 read from sicofi-4 pwrup power up / power down pwrup = 1 sets the assigned channel (see bit ad) of sicofi-4 to power-up (operating mode) pwrup = 0 resets the assigned channel of sicofi-4 to power-down (standby mode) lsel length select information (see also programming procedure, page 74 ) this field identifies the number of subsequent data bytes lsel = 000 0 bytes of data are following lsel = 001 1 byte of data is following (cr1) lsel = 010 2 bytes of data are following (cr2, cr1) lsel = 011 3 bytes of data are following (cr3, cr2, cr1) lsel = 100 4 bytes of data are following (cr4, cr3, cr2, cr1) all other codes are reserved for future use! it is possible to program each configuration register separately, just by putting only one byte into the fifo of the upstream master device (e.g. epic), and aborting after transmission of one (or n) byte. bit76543210 ad rw pwrup 1 0 lsel2 lsel1 lsel0
peb 2465 programming the sicofi ? -4 semiconductor group 30 02.97 3.4.1 cr1 configuration register 1 configuration register cr1 defines the basic sicofi-4 settings, which are: enabling/ disabling the programmable digital filters and tone generators. th enable th- (transhybrid balancing) filter th = 0: th-filter disabled th = 1: th-filter enabled im/r1 enable im-(impedance matching) filter and r1-filter im/r1 = 0: im-filter and r1-filter disabled im/r1 = 1: im-filter and r1-filter enabled frx enable frx (frequency response transmit)-filter frx = 0: frx-filter disabled frx = 1: frx-filter enabled frr enable frr (frequency response receive)-filter frr = 0: frr-filter disabled frr = 1: frr-filter enabled ax enable ax-(amplification/attenuation transmit) filter ax = 0: ax-filter disabled ax = 1: ax-filter enabled ar enable ar-(amplification/attenuation receive) filter ar = 0: ar-filter disabled ar = 1: ar-filter enabled etg2 enable programmable tone generator 2 1) etg2 = 0 : programmable tone generator 2 is disabled etg2 = 1: programmable tone generator 2 is enabled etg1 enable programmable tone generator 1 etg1 = 0 : programmable tone generator 1 is disabled etg1 = 1: programmable tone generator 1 is enabled 1) tone generator 2 is not available if level metering function is enabled! bit76543210 th im/r1 frx frr ax ar etg2 etg1
peb 2465 programming the sicofi ? -4 semiconductor group 31 02.97 3.4.2 cr2 configuration register 2 th-sel 2 bit field to select one of four programmed th-filter coefficient sets th-sel = 0 0: th-filter coefficient set 1 is selected th-sel = 0 1: th-filter coefficient set 2 is selected th-sel = 1 0: th-filter coefficient set 3 is selected th-sel = 1 1: th-filter coefficient set 4 is selected lm level metering function 1 1) lm = 0 : level metering function is disabled lm = 1: level metering function is enabled lmr result of level metering function (this bit can not be written) lmr = 0: level detected was lower than the reference lmr = 1: level detected was higher than the reference law pcm - law selection law = 0: a-law is selected law = 1: m -law ( m 255 pcm) is selected lin linear mode selection lin = 0: pcm-mode is selected lin = 1: linear mode is selected 2) ptg2 user programmed frequency or fixed frequency is selected ptg2 = 0: fixed frequency for tone generator 2 is selected (1 khz) ptg2 = 1: programmed frequency for tone generator 2 is selected ptg1 user programmed frequency or fixed frequency is selected ptg1 = 0: fixed frequency for tone generator 1 is selected (1 khz) ptg1 = 1: programmed frequency for tone generator 1 is selected 1) explanation of the level metering function: a signal fed to a/ m -law compression via ax- and hpx-filters (from a digital loop, or externally via v in ), is rectified, and the power is measured. if the power exceeds a certain value, loaded to xr4, bit lmr is set to 1. the power of the incoming signal can be adjusted by ax-filters. 2) during linear operation only one 16 bit voice channel, is available per timeslot. depending on the address bit (ad) the voice-data of channel 1 or 2 is transmitted. the other voice channel is not available during this time. bit76543210 th-sel lm lmr law lin ptg2 ptg1
peb 2465 programming the sicofi ? -4 semiconductor group 32 02.97 3.4.3 cr3 configuration register 3 cot/r selection of cut of transmit/receive paths 0 0 0: normal operation 0 0 1: cot_16k cut off transmit path at 16 khz (input of th-filter) 0 1 0: cot_pcm cut off transmit path at 8 khz (input of compression) (output is zero for m -law and linear mode, 1 lsb for a-law) 1 0 1: cor_pfi cut off receive path at 4 mhz (pofi-output) 1 1 0: cor_64k cut off receive path at 64 khz (im-filter input) idr initialize data ram idr = 0: normal operation is selected idr = 1: contents of data ram is set to 0 (used for production test purposes) version the version number shows the actual design version of sicofi-4 ( 001 for peb 2465 v1.1 010 for peb 2465 v1.2 011 for peb 2465 v2.1 100 for peb 2465 v2.2 and v2.3) bit76543210 cot/r 0 idr version
peb 2465 programming the sicofi ? -4 semiconductor group 33 02.97 cut offs and loops figure 8
peb 2465 programming the sicofi ? -4 semiconductor group 34 02.97 3.4.4 cr4 configuration register 4 test-loops 4 bit field for selection of analog and digital loop backs 0 0 0 0: no loop back is selected (normal operation) 0 0 0 1: alb-pfi analog loop back via prefi-pofi is selected 0 0 1 1: alb-4m analog loop back via 4 mhz is selected 0 1 0 0: alb-pcm analog loop back via 8 khz (pcm) is selected 0 1 0 1: alb-8k analog loop back via 8 khz (linear) is selected 1 0 0 0: dlb-ana digital loop back via analog port is selected 1 0 0 1: dlb-4m digital loop back via 4 mhz is selected 1 1 0 0: dlb-128k digital loop back via 128 khz is selected 1 1 0 1: dlb-64k digital loop back via 64 khz is selected 1 1 1 1: dlb-pcm digital loop back via pcm-registers is selected agx analog gain in transmit direction agx = 0: analog gain is disabled agx = 1: analog gain is enabled (6.02 db amplification) agr analog gain in receive direction agr = 0: analog gain is disabled agr = 1: analog gain is enabled (6.02 db attenuation) d-hpx disable highpass in transmit direction d-hpx = 0: transmit high pass is enabled d-hpx = 1: transmit high pass is disabled 1) d-hpr disable highpass in receive direction d-hpr = 0: receive high pass is enabled d-hpr = 1: receive high pass is disabled 2) 1) in this case the transmit-path signal is attenuated 0.06 db 2) in this case the receive-path signal is attenuated 0.12 db bit76543210 test-loops agx agr d-hpx d-hpr
peb 2465 programming the sicofi ? -4 semiconductor group 35 02.97 3.5 cop command with a cop command coefficients for the programmable filters can be written to the sicofi-4 coefficient ram or read from the coefficient ram via the iom-2 interface for verification. ad address ad = 0 sicofi-4 channel 1 (3) is addressed ad = 1 sicofi-4 channel 2 (4) is addressed rw read/write rw = 0 subsequent data is written to the sicofi-4 rw = 1 read data from sicofi-4 rst reset rst = 1 reset sicofi-4 (same as reset-pin, valid for all four channels) code includes number of following bytes and filter-address bit76543210 ad rw rst 0 code3 code2 code1 code0 0 0 0 0 th-filter coefficients (part 1) (followed by 8 bytes of data) 0 0 0 1 th-filter coefficients (part 2) (followed by 8 bytes of data) 0 0 1 0 th-filter coefficients (part3) (followed by 8 bytes of data) 0 1 0 0 im-filter coefficients (part1) (followed by 8 bytes of data) 0 1 0 1 im-filter coefficients (part2) (followed by 8 bytes of data) 0 1 1 0 frx-filter coefficients (followed by 8 bytes of data) 0 1 1 1 frr-filter coefficients (followed by 8 bytes of data) 1 0 0 0 ax-filter coefficients (followed by 4 bytes of data) 1 0 0 1 ar-filter coefficients (followed by 4 bytes of data) 1 1 0 0 tg1-filter coefficients (followed by 4 bytes of data) 1 1 0 1 tg2-filter coefficients (followed by 4 bytes of data)
peb 2465 programming the sicofi ? -4 semiconductor group 36 02.97 3.6 how to program the filter coefficients th-filter: four sets of th-filter coefficients can be loaded to the sicofi-4. each of the four sets can be selected for any of the four sicofi-4 channels, by setting the value of th-sel in configuration register cr2. coefficient set 1 is loaded to the sicofi-4 via channel 1, set 2 is loaded via channel 2 and so on. ax, ar, im, frx, frr-filter: an individual coefficient set is available for each of the four channels tone-generators: an individual coefficient set is available for each of the four channels an independent set of coefficients is available for all the four channels, for all the filters and tone-generators. so ax, ar, frr, frx, im and tg1 and tg2 behave like ax and ar-filters in version v1.*. the programming flexibility for the th-filter was not changed from version v1.* to version v2.*. four sets of th-filter coefficients can be loaded to the sicofi-4. each of the four sets can be selected for any of the four sicofi-4 channels, by setting the value of th-sel in configuration register cr2. coefficients set #1 is loaded to the sicofi-4 via channel 1, set #2 is loaded via channel 2 and so on. note: after reset coefficient set #1 is used for all of the four channels, as all bits in configuration register cr2 are set to 0. figure 9 channel registers
peb 2465 programming the sicofi ? -4 semiconductor group 37 02.97 3.7 xop command with the xop command the sicofi-4 c/i channel is configured and evaluated. the xr registers are valid for two voice channels 1, 2 or 3, 4 , depending on the selected iom-2 timeslot 1) (i.e. ts0+ts1: channel 1, 2 in ts0, channel 3, 4 in ts1). rw read / write information: enables reading from the sicofi-4 or writing information to the sicofi-4 rw = 0 write to sicofi-4 rw = 1 read from sicofi-4 lsel length select information, for setting the number of subsequent data bytes lsel = 000 0 bytes of data are following lsel = 001 1 byte of data is following (xr1) lsel = 010 2 bytes of data are following (xr2, xr1) lsel = 011 3 bytes of data are following (xr3, xr2, xr1) lsel = 100 4 bytes of data are following (xr4, xr3, xr2, xr1) 3.7.1 xr1 extended register 1 2) sb2[4]_1 status of pin sb2[4]_1 is transferred to the upstream master device sb2[4]_0 status of pin sb2[4]_0 is transferred to the upstream master device si2[4]_0 status of pin si2[4]_0 is transferred to the upstream master device sb1[3]_1 status of pin sb1[3]_1 is transferred to the upstream master device sb1[3]_0 status of pin sb1[3]_0 is transferred to the upstream master device si1[3]_0 status of pin si1[3]_0 is transferred to the upstream master device 1) iom-2 timeslots ts0+ts1, ts2+ts3, ts4+ts5 or ts6+ts7, by pin-strapping the pins tss0 and tss1 (see pages 19 and 20 ) 2) register xr1 can be read only. 3) bits si1[3]_0 and si2[4]_0 have special meaning depending on contents of xr2 (see page 39 ). bit76543210 0 rw 0 1 1 lsel2 lsel1 lsel0 bit76543210 sb2[4]_1 sb2[4]_0 si2[4]_03 3) si2[4]_0 3) sb1[3]_1 sb1[3]_0 si1[3]_0 3) si1[3]_0 3)
peb 2465 programming the sicofi ? -4 semiconductor group 38 02.97 3.7.2 xr2 extended register 2 register xr2 configures the data-upstream command/indication channel. upstream update interval n to restrict the rate of upstream c/i-bit changes, deglitching (persistence checking) of the status information from the slic may be applied. new status information will be transmitted upstream, after it has been stable for n milliseconds. n is programmable in the range of 1 to 15 ms in steps of 1 ms, with n = 0 the deglitching is disabled. detector select sampling interval t slics with multiplexed loop- and ground-key-status, which have a single status output pin for carrying the loop- and ground-key-status information, need a special detector select input. lgkm0[1] is detector select output for channel 1[3] and 2[4] bit76543210 nt table 3 field n update interval time 0 0 0 0 deglitching is disabled 0 0 0 1 upstream transmission after 1 ms 0 0 1 0 upstream transmission after 2 ms ..... ..... 1 1 1 0 upstream transmission after 14 ms 1 1 1 1 upstream transmission after 15 ms table 4 field t time interval t between detector selected high states 0 0 0 0 detector select output lgkm0,1 program. to 0 permanently 0 0 0 1 time interval t is 1 ms 0 0 1 0 time interval t is 2 ms ..... ..... 1 1 1 0 time interval t is 14 ms 1 1 1 1 detector select output lgkm0,1 is program. to 1 permanently
peb 2465 programming the sicofi ? -4 semiconductor group 39 02.97 slics with multiplexed loop/ground key detect figure 10 sicofi-4 pins lgkm0,[1] are detector select outputs. these command output pins are normally set to logical 0, such that the slic outputs loop status, which is passed to xr1 - bits 0 and 4 via indication pins si1_0 and si2_0. every t milliseconds, the detector select outputs change to logical 1 for a time of 125 m s (period fsc). during this time the ground key status is read from the slic and transferred upstream using xr1 - bits 1 and 5 via indication pins six_0 and siy_0. the time interval t is programmable from 1 ms to 14 ms in 1 ms steps. it is possible to program the output to be permanently logical 0 or 1.
peb 2465 programming the sicofi ? -4 semiconductor group 40 02.97 3.7.3 xr3 extended register 3 this register controls the direction of the programmable c/i pins. psb2[4]_1 programmable bi-directional c/i pin sb2[4]_1 is programmed psb2[4]_1 = 0: pin sb2[4]_1 is indication input psb2[4]_1 = 1: pin sb2[4]_1 is command output psb2[4]_0 programmable bi-directional c/i pin sb2[4]_0 is programmed psb2[4]_0 = 0: pin sb2[4]_0 is indication input psb2[4]_0 = 1: pin sb2[4]_0 is command output psb1[3]_1 programmable bi-directional c/i pin sb1[3]_1 is programmed psb1[3]_1 = 0: pin sb1[3]_1 is indication input psb1[3]_1 = 1: pin sb1[3]_1 is command output psb1[3]_0 programmable bi-directional c/i pin sb1[3]_0 is programmed psb1[3]_0 = 0: pin sb1[3]_0 is indication input psb1[3]_0 = 1: pin sb1[3]_0 is command output 3.7.4 xr4 extended register 4 this register holds the offset value for the level metering function. it is only available via the first used timeslot. bit76543210 psb2[4]_1 psb2[4]_0 0 0 psb1[3]_1 psb1[3]_0 0 0 bit76543210 of7 of6 of5 of4 of3 of2 of1 of0
peb 2465 slic interface semiconductor group 41 02.97 4 slic interface the signaling connection between sicofi-4 and a slic is performed by the sicofi-4 command/indication pins. data received from the downstream c/i byte are inverted and transferred to command output pins (sb, so). data on input pins (si, sb) are inverted and transferred to the upstream c/i-byte. 4.1 iom ? -2 interface command/indication byte the sicofi-4 offers a 8 pin parallel command/indication slic interface per channel indication input pins : six_0, six_1 six_2 command output pins : sox_0, sox_1, sox_2 program. command/indication pins: sbx_0, sbx_1 (with x: 1 ? 4) data present at six_0, six_1, six_2 and sbx_0, sbx_1 (if programmed as input) are sampled, inverted and transferred upstream. data received downstream from iom-2 interface are latched, inverted and fed to sox_0, sox_1, sox_2 and sbx_0, sbx_1 (if output). 4.2 data-downstream c/i channel byte format (receive) the iom-2 channel contains 6 bits (for two voice channels) in both directions for analog devices like the sicofi-4. as the sicofi-4 has up to five command output pins per channel (depending on xr3) it is not possible to send commands to all pins at a time. so c/i-channel bit 5 is used as an address bit to select the channel for the command data on c/i-channel bits 4 ? 0. general case: example for sicofi-4 channels 1 and 2 (iom-2 timeslot 0): 4.3 data upstream c/i channel byte format (transmit) 1) if sbx_y is programmed as command output. bit543210 ad sbx_1 sbx_0 sox_2 sox_1 sox_0 bit543210 1 sb1_1 1) sb1_0 1) so1_2 so1_1 so1_0 bit543210 0 sb2_1 1) sb2_0 1) so2_2 so2_1 so2_0
peb 2465 slic interface semiconductor group 42 02.97 as the c/i-channel holds only 6 bits for two voice channels and the sicofi-4 has up to five indication pins per voice channel, only pins si1_1 and si1_2 for voice channel 1, and pins si2_1 and si2_2 for voice channel 2 are fed directly to the c/i-channel. any change at one of the other indication pins (six_0, sbx_0 and sbx_1) will generate an interrupt per channel, which is transmitted upstream immediately (c/i-channel bits 2 and 5). data on those pins is fed to register xr1 and can be evaluated with a xop-read command. figure 11 there was a functional connection between two neighboring channels sharing the same c/i-channel of an iom-2 interface in v1.*. when an interrupt occurred in the c/i-channel, changes on all signaling input pins of this channel and of the neighboring channel were ignored, until the interrupt was cleared. in version v2.* this functional connection no longer exists . if an interrupt occurs in one channel, changes in the neighboring channel will also generate an interrupt.
peb 2465 slic interface semiconductor group 43 02.97 figure 12 data flow
peb 2465 operating modes semiconductor group 44 02.97 5 operating modes figure 13 5.1 reset (basic setting mode) upon initial application of v dd or resetting pin reset to 1 during operation, or by software-reset (see cop command, page 35 ), the sicofi-4 enters a basic setting mode. basic setting means, that the sicofi-4 configuration registers cr1 ? cr4 and xr1 ? xr3 are initialized to 0 for all channels. all programmable filters are disabled, a-law is chosen, all programmable command/ indication pins are inputs. the two tone generators as well as any testmodes are disabled. there is no persistence checking. receive signaling registers are cleared. du-pin is in high impedance state, the analog outputs and the signaling outputs are forced to ground.
peb 2465 operating modes semiconductor group 45 02.97 if any voltage is applied to any input-pin before initial application of v dd , the sicofi-4 may not enter the basic setting mode. in this case it is necessary to reset the sicofi-4 or to initialize the sicofi-4 configuration registers to 0. the sicofi-4 leaves this mode automatically with the beginning of the next 8 khz frame (reset-pin is released). 5.2 standby mode after releasing the reset-pin, (reset-state), beginning with the next 8 khz frame, the sicofi-4 will enter the standby mode. the sicofi-4 is forced to standby mode with the pwrup bit set to 0 in the sop command (powerdown). all 4 channels must be programmed separately. during standby mode the serial sicofi-4 iom-2 interface is ready to receive and transmit commands and data. received voice data on dd-pin will be ignored. sicofi-4 configuration registers and coefficient ram can be loaded and read back in this mode. data downstream c/i-channel data is fed to appropriate command pins. data on indication pins is transmitted data upstream. 5.3 operating mode the operating mode for any of the four channels is entered upon recognition of a pwrup bit set to 1 in a sop command for the specific channel. table 5 cr1 ? cr4 00 hex xr1 ? xr4 00 hex coefficient ram not defined command stack cleared dd-input ignored du-output high impedance v out1, 2, 3, 4 gnda1, 2, 3, 4 sbx_y input sox_y gndd table 6 iom-2 voice channels 11111111 (idle) v out1, 2, 3, 4 gnda1, 2, 3, 4
peb 2465 programmable filters semiconductor group 46 02.97 6 programmable filters based on an advanced digital filter concept, the peb 2465 provides excellent transmission performance and high flexibility. the new filter concept leads to a maximum independence between the different filter blocks. 6.1 impedance matching filter ? realization by 3 different loops C 4 mhz: multiplication by a constant (12 bit) C 128 khz: wave digital filter (iir) (60 bit) (improves low frequency response) C 64 khz: fir-filter (48 bit) (for fine-tuning) ? improved stability behavior of feedback loops ? real part of termination impedance positive under all conditions ? improved overflow performance for transients ? return loss better 30 db 6.2 transhybrid balancing (th) filter ? new concept: 2 loops at 16 khz ? flexible realization allows optimization of wide impedance range ? consists of a fixed and a programmable part C2 nd order wave digital filter (iir) (106 bit) (improves low frequency response) C 7-tap fir-filter (84 bit) (for fine-tuning) ? trans-hybrid-loss better 30 db (typically better 40 db, device only) ? adaptation to different lines by: C easy selection between four different downloaded coefficient sets 6.3 filters for frequency response correction ? for line equalization and compensation of attenuation distortion ? improvement of group-delay-distortion by using minimum phase filters (instead of linear phase filters) ? frr filter for correction of receive path distortion C 5 tap programmable fir filter operating at 8 khz (60 bit) ? frx filter for correction of transmit path distortion C 5 tap programmable fir filter operating at 8 khz (60 bit) ? frequency response better 0.1 db
peb 2465 programmable filters semiconductor group 47 02.97 6.4 amplification/attenuation-filters ax1, ax2, ar1, ar2 ? improved level adjustment for transmit and receive ? two separate filters at each direction for C improved trans-hybrid balancing C optimal adjustment of digital dynamic range C gain adjustments independent of th-filter 6.5 amplification/attenuation receive (ar1, ar2)-filter step size for ar-filter range 3 ?- 14 db: step size 0.02 ? 0.05 db range - 14 ?- 24 db: step size 0.5 db 6.6 amplification/attenuation transmit (ax1, ax2)-filter step size for ax-filter range - 3 ? 14 db: step size 0.02 ? 0.05 db range 14 ? 24 db: step size 0.5 db
peb 2465 qsicos software semiconductor group 48 02.97 7 qsicos software the qsicos-software has been developed to help to obtain an optimized set of coefficients both quickly and easily. the qsicos program runs on any pc with at least 575 kbytes of memory. this also requires ms-dos version 5.0 or higher, as well as extended memory. figure 14
peb 2465 qsicos software semiconductor group 49 02.97 7.1 qsicos supports ? calculation of coefficients for the C impedance filter (im) for return loss calculation C frr and frx-filters for frequency response in receive and transmit path C ar1, ar2 and ax1, ax2-filter for level adjustment in receive and transmit path C trans-hybrid balancing filter (th) and C two programmable tone generators (tg 1 and tg 2) ? simulation of the peb 2465 and slic system with fixed filter coefficients allows simulations of tolerances which may be caused e.g. by discrete external components. ? graphical output of transfer functions to the screen for C return loss C frequency responses in receive and transmit path C transhybrid loss ? calculation of the peb 2465 and slic system stability . the im-filter of the peb 2465 adjust the total system impedance by making a feedback loop. because the line is also a part of the total system, a very robust method has to used to avoid oscillations and to ensure system stability. the input impedance of the peb 2465 and slic combination is calculated. if the real part of the system input impedance is positive, the total system stability can be guaranteed.
peb 2465 transmission characteristics semiconductor group 50 02.97 8 transmission characteristics the proper adjustment of the programmable filters (transhybrid balancing, impedance matching, frequency-response correction) needs a complete knowledge of the sicofi-4s analog environment, and it is suggested to use the qsicos-program for calculating the propriate coefficients. unless otherwise stated, the transmission characteristics are guaranteed within the test conditions. test conditions t a = 0 c to 70 c; v dd = 5 v 5%; gnda1 ? 4 = gndd = 0 v; r l 1) > 20 k w ; c l < 20 pf; h(im) = h(th) = 0; h(r1) = h(frx) = h(frr) = 1; hpr and hpx enabled; ar 2) = 0 to - 13 db for sine-wave-, and 0 to - 11 db for ccitt-noise-measurements a x 3) = 0 to 13 db for sine-wave-, and 0 to 11 db for ccitt-noise-measurements f = 1014 hz; 0 dbm0; a-law or m -law; agx = 0 db, 6.02 db, agr = 0 db, - 6.02 db; in transmit direction for m -law an additional gain of 1.94 db is implemented automatically, in the companding block (cmp). this additional gain has to be considered at all gain calculations, and reduces possible ax-gain. a 0 dbm0 4 4) ) signal is equivalent to 1.095 [1.0906] vrms. a + 3.14 [3.17] dbm0 signal is equivalent to 1.57 vrms which corresponds to the overload point of 2.223 v (a-law,[ m -law]). when the gain in the receive path is set at 0 db, an 1014 hz pcm sinewave input with a level 0 dbm0 will correspond to a voltage of 1.095 vrms at a-law (1.0906 v m -law) at the analog output. when the gain in the transmit path is set at 0 db, an 1014 hz sine wave signal with a voltage of 1.095 vrms a-law (1.0906 v m -law) will correspond to a level of 0 dbm0 at the pcm output. 1) r l , c l forms the load on v out 2) consider, in a complete system, ar = ar1 + ar2 + frr + r1 3) consider, in a complete system, ax = ax1 + ax2 + frx 4) the absolute power level in decibels referred to the pcm interface levels.
peb 2465 transmission characteristics semiconductor group 51 02.97 1) using equal-level, 4-tone method (eia) at a composite level of C 13 dbm0 with frequencies in the range between 300 hz and 3400 hz. table 7 transmission characteristics parameter symbol limit values unit min. typ. max. gain absolute (agx = agr = 0) t a =25 c; v dd =5v t a =0C70 c; v dd =5v 5% g C 0.15 C 0.25 0.10 + 0.15 + 0.25 db db gain absolute (agx = 6.02 db, agr = C 6.02 db) t a =25 c; v dd =5v t a =0C70 c; v dd =5v 5% g C 0.15 C 0.25 0.10 + 0.15 + 0.25 db db harmonic distortion, 0 dbm0; f = 1000 hz; 2 nd ,3 rd order hd C 50 C 44 db intermodulation 1) r2 r3 imd imd C46 C56 db db crosstalk 0 dbm0; f = 200 hz to 3400 hz any combination of direction and channel ct C 85 C 80 db idle channel noise, transmit, a-law, psophometric v in =0v transmit, m -law, c-message v in =0v receive, a-law, psophometric idle code + 0 receive, m -law, c-message idle code + 0 n tp n tc n rp n rc C85 5 C 67.4 17.5 C 78.0 12.0 dbm0p dbmc dbm0p dbmc
peb 2465 transmission characteristics semiconductor group 52 02.97 8.1 frequency response figure 15 receive: reference frequency 1 khz, input signal level 0 dbm0 figure 16 transmit: reference frequency 1 khz, input signal level 0 dbm0
peb 2465 transmission characteristics semiconductor group 53 02.97 8.2 group delay maximum delays when the sicofi-4 is operating with h(th) = h(im) = 0 and h(frr) = h(frx) = 1 including delay through a/d- and d/a converters. specific filter programming may cause additional group delays. group delay deviations stay within the limits in the figures below. figure 17 group delay distortion transmit: input signal level 0 dbm0 table 8 group delay absolute values: input signal level 0 dbm0 parameter symbol limit values unit reference min. typ. max. transmit delay d xa 300. m s receive delay d ra 250 m s
peb 2465 transmission characteristics semiconductor group 54 02.97 figure 18 group delay distortion receive: input signal level 0 dbm0 1) 1) hpr is switched on: reference point is at t gmin hpr is switched off: reference is at 1.5 khz
peb 2465 transmission characteristics semiconductor group 55 02.97 8.3 out-of-band signals at analog input with an 0 dbm0 out-of-band sine wave signal with frequency f (<< 100 hz or 3.4 khz to 100 khz) applied to the analog input, the level of any resulting frequency component at the digital output will stay at least x db below a 0 dbm0, 1 khz sine wave reference signal at the analog input 1) . figure 19 1) poles at 12 khz 150 hz and 16 khz 150 hz are provided 3.4 4.0 khz: x 14 C p 4000 f C 1200 ---------------------- ? ?? sin 1 C ? ?? = 4.0 4.6 khz: B x18 C p 4000 f C 1200 ---------------------- ? ?? sin 7 9 -- - C ? ?? =
peb 2465 transmission characteristics semiconductor group 56 02.97 8.4 out-of-band signals at analog output with a 0 dbm0 sine wave with frequency f (300 hz to 3.99 khz) applied to the digital input, the level of any resulting out-of-band signal at the analog output will stay at least x db below a 0 dbm0, 1 khz sine wave reference signal at the analog output. figure 20 3.4 4.6 khz: x 14 C p 4000 f C 1200 ---------------------- ? ?? sin 1 C ? ?? =
peb 2465 transmission characteristics semiconductor group 57 02.97 8.5 out of band idle channel noise at analog output with an idle code applied to the digital input, the level of any resulting out-of-band power spectral density (measured with 3 khz bandwidth) at the analog output, will be not greater than the limit curve shown in the figure below. figure 21 8.6 overload compression figure 22 m -law, transmit: measured with sine wave f = 1014 hz.
peb 2465 transmission characteristics semiconductor group 58 02.97 8.7 gain tracking (receive or transmit) the gain deviations stay within the limits in the figures below. figure 23 gain tracking: (measured with sine wave f = 1014 hz, reference level is 0 dbm0) 8.8 total distortion the signal to distortion ratio exceeds the limits in the following figure. 8.8.1 total distortion measured with sine wave figure 24 receive or transmit: measured with sine wave f = 1014 hz. (c-message weighted for m -law, psophometricaly weighted for a-law)
peb 2465 transmission characteristics semiconductor group 59 02.97 8.8.2 total distortion measured with noise according to ccitt figure 25 receive figure 26 transmit
peb 2465 transmission characteristics semiconductor group 60 02.97 8.9 single frequency distortion an input signal with its frequency swept between 0.3 to 3 khz for the receive path, or 0 to 12 khz for the transmit path, any generated output signal with other frequency than the input frequency will stay 28 db below the maximum input level of 0 dbm0. 8.10 transhybrid loss the quality of transhybrid-balancing is very sensitive to deviations in gain and group delay - deviations inherent to the sicofi-4 a/d- and d/a-converters as well as to all external components used on a line card (slic, ops etc.) measurement of sicofi-4 transhybrid-loss: a 0 dbm0 sine wave signal and a frequency in the range between 300 - 3400 hz is applied to the digital input. the resulting analog output signal at pin v out is directly connected to v in , e.g. with the sicofi-4 testmode digital loop back via analog port. the programmable filters frr, ar, frx, ax and im are disabled, the balancing filter th is enabled with coefficients optimized for this configuration ( v out = v in ). the resulting echo measured at the digital output is at least x db below the level of the digital input signal as shown in the table below. (filter coefficients will be provided) the listed values for thl correspond to a typical variation of the signal amplitude and -delay in the analog blocks. d amplitude = typ 0.15 db d delay = typ 0.5 m s table 9 receive transmit frequency max. input level frequency max. input level 300 hz to 3.4 khz 0 dbm0 0 to 12 khz 0 dbm 0 table 10 parameter symbol limit values unit test condition min. typ. transhybrid loss at 300 hz thl 300 27 40 db t a =25 c; v dd =5v transhybrid loss at 500 hz thl 500 33 45 db t a =25 c; v dd =5v transhybrid loss at 2500 hz thl 2500 29 40 db t a =25 c; v dd =5v transhybrid loss at 3000 hz thl 3000 27 35 db t a =25 c; v dd =5v transhybrid loss at 3400 hz thl 3400 27 35 db t a =25 c; v dd =5v
peb 2465 electrical characteristics semiconductor group 61 02.97 9 electrical characteristics 9.1 absolute maximum ratings note: maximum ratings are absolute ratings; exceeding only one of these values may cause irreversible damage to the integrated circuit. the listed characteristics are ensured over the operating range of the integrated circuit. typical characteristics specify mean values expected over the production spread. if not otherwise specified, typical characteristics apply at t a = 25 c and the given supply voltage. parameter symbol limit values unit test condition min. max. v dd referred to gndd - 0.3 7.0 v gnda to gndd - 0.6 0.6 v analog input and output voltage referred to v dd =5v; referred to gnd a=0v - 5.3 - 0.3 0.3 5.3 v v all digital input voltages referred to gndd = 0 v; ( v dd =5v) referred to v dd =5v; (gnd d=0v) - 0.3 - 5.3 5.3 0.3 v v dc input and output current at any input or output pin (free from latch-up) 10 ma storage temperature ambient temperature under bias t stg t a - 60 - 10 125 80 c c power dissipation (package) p d 1w
peb 2465 electrical characteristics semiconductor group 62 02.97 9.2 operating range note: in the operating range the functions given in the circuit description are fulfilled. 9.3 digital interface t a = 0 to 70 c; v dd =5 v 5 %; gndd = 0 v; gnda = 0 v parameter symbol limit values unit test condition min. typ. max. v dd supply current standby operating (4 channels) i dd 1.2 27 1.5 40 ma ma power supply rejection of either supply/direction receive v dd guaranteed receive v dd target value p srr 30 14 30 db db db ripple: 0 to 150 khz, 70 mvrms measured: 300 hz to 3.4 khz measured: at f : 3.4 to 150 khz power dissipation standby p ds 15 20 mw power dissipation operating p do1 75 110 mw 1 channel operating power dissipation operating p do2 100 140 mw 2 channels operating power dissipation operating p do3 120 175 mw 3 channels operating power dissipation operating p do4 140 210 mw 4 channels operating t a = 0 to 70 c; v dd =5v 5 %; gndd = 0 v; gnda = 0 v all input-pins, with exception of the reset-pin, have a ttl-input characteristic. parameter symbol limit values unit test condition min. max. low-input voltage v il - 0.3 0.8 v high-input voltage v ih 2.0 v low-output voltage v ol 0.45 v i o = - 5 ma low-output voltage du-pin v ol 0.45 v i o = - 7 ma, r l =1 k w high-output voltage v oh 4.4 v i o = 5 ma input leakage current i il 1 m a - 0.3 v in v dd
peb 2465 electrical characteristics semiconductor group 63 02.97 9.4 analog interface 9.5 reset timing to reset the sicofi-4 to basic setting mode, positive pulses applied to pin rs have to be higher than 2.4 v (cmos-schmitt-trigger input) and longer than 3 m s. signals shorter than 1 m s will be ignored. t a = 0 to 70 c; v dd =5v 5%; gndd=0v; gnda=0v parameter symbol limit values unit test condition min. typ. max. analog input resistance r i 160 270 480 k w analog output resistance r o 10 w analog output load r l c l 20 20 k w pf input leakage current i il 0.1 1.0 m a0 v in v dd input voltage range (ac) v ir 2.223 v
peb 2465 electrical characteristics semiconductor group 64 02.97 9.6 iom ? -2 interface timing 9.6.1 4-mhz operation mode (mode = 1) figure 27 1) dcl = 4096 khz: t fsc = 512 t dcl 2) depending on pull up resistor (typical 1 k w ), du and dd are open drain-lines. table 11 switching characteristics parameter symbol limit values unit min. typ. max. period dcl fast mode 1) t dcl 1/4096 khz dcl duty cycle 40 60 % period fsc 1) t fsc 125 m s fsc setup time t fsc_s 70 t dclh ns fsc hold time t fsc_h 40 ns dd data in setup time t dd_s 20 ns dd data in hold time t dd_h 50 ns du data out delay 2) t ddu 150 320 ns
peb 2465 electrical characteristics semiconductor group 65 02.97 9.6.2 2-mhz operation mode (mode = 0) figure 28 1) dcl = 2048 khz: t fsc = 256 t dcl 2) depending on pull up resistor (typical 1 k w ), du and dd are open drain-lines. table 12 switching characteristics parameter symbol limit values unit min. typ. max. period dcl slow mode 1) t dcl 1/2048 khz dcl duty cycle 40 60 % period fsc 1) t fsc 125 m s fsc setup time t fsc_s 70 t dclh ns fsc hold time t fsc_h 40 ns dd data in setup time t dd_s 20 ns dd data in hold time t dd_h 50 ns du data out delay 2) t ddu 150 175 ns
peb 2465 electrical characteristics semiconductor group 66 02.97 9.7 iom ? -2 command/indication interface timing 9.7.1 4-mhz operation mode (mode = 1) figure 29
peb 2465 electrical characteristics semiconductor group 67 02.97 9.7.2 2-mhz operation mode (mode = 0) figure 30 table 13 switching characteristics parameter symbol limit values unit min. typ. max. command out delay t dcout 150 250 ns command out high impedance t dcz 150 250 ns command out active t dca 150 250 ns indication in setup time t lin_s 50 ns indication in hold time t lin_h 100 ns
peb 2465 electrical characteristics semiconductor group 68 02.97 9.8 detector select timing figure 31 table 14 switching characteristics parameter symbol limit values unit min. typ. max. detector select high time t lgkmh 125 m s detector select repeat t lgkm 1 ? 14 ms indication in setup time t lin_s 50 ns indication in hold time t lin_h 100 ns
peb 2465 appendix semiconductor group 69 02.97 10 appendix 10.1 iom ? -2 interface monitor transfer protocol 10.1.1 monitor channel operation the monitor channel is used for the transfer of maintenance information between two functional blocks. using two monitor control bits (mr and mx) per direction, the data are transferred in a complete handshake procedure. the mr and mx bits in the fourth octet (c/i channel) of the iom-2 frame are used for the handshake procedure of the monitor channel. the monitor channel transmission operates on a pseudo-asynchronous basis: C data transfer (bits) on the bus is synchronized to frame sync fsc C data flow (bytes) are asynchronously controlled by the handshake procedure. for example: data is placed onto the dd-monitor-channel by the monitor-transmitter of the master device (dd-mx-bit is activated i.e. set to 0). this data transfer will be repeated within each frame (125 m s rate) until it is acknowledged by the sicofi-4 monitor-receiver by setting the du-mr-bit to 0, which is checked by the monitor-transmitter of the master device. thus, the data rate is not 8-kbytes/sec. figure 32
peb 2465 appendix semiconductor group 70 02.97 10.1.2 monitor handshake procedure the monitor channel works in 3 states C idle state: a pair of inactive (set to 1) mr- and mx-bits during two or more consecutive frames: end of message (eom) C sending state: mx-bit is activated (set to 0) by the monitor-transmitter, together with data-bytes (can be changed) on the monitor-channel C acknowledging: mr-bit is set to active (set to 0) by the monitor-receiver, together with a data-byte remaining in the monitor-channel. a start of transmission is initiated by a monitor-transmitter in sending out an active mx-bit together with the first byte of data (the address of the receiver) to be transmitted in the monitor-channel. this state remains until the addressed monitor-receiver acknowledges the received data by sending out an active mr-bit, which means that the data-transmission is repeated each 125 m s frame (minimum is one repetition). during this time the monitor-transmitter evaluates the mr-bit. flow control, means in the form of transmission delay, can only take place when the transmitters mx and the receivers mr bit are in active state. since the receiver is able to receive the monitor data at least twice (in two consecutive frames), it is able to check for data errors. if two different bytes are received the receiver will wait for the receipt of two identical successive bytes (last look function). a collision resolution mechanism (check if another device is trying to send data during the same time) is implemented in the transmitter. this is done by looking for the inactive (1) phase of the mx-bit and making a per bit collision check on the transmitted monitor data (check if transmitted 1s are on du/dd-line; du/dd-line are open-drain lines). any abort leads to a reset of the sicofi-4 command stack, the device is ready to receive new commands. to obtain a maximum speed data transfer, the transmitter anticipates the falling edge of the receivers acknowledgment. due to the inherent programming structure, duplex operation is not possible. it is not allowed to send any data to the sicofi-4, while transmission is active.
peb 2465 appendix semiconductor group 71 02.97 10.1.3 state diagram of the sicofi ? -4 monitor transmitter figure 33 mr ? mr - bit received on dd-line mx ? mx - bit calculated and expected on du-line mxr ? mx - bit sampled on du-line cls ? collision within the monitor data byte on du-line rqt ? request for transmission form internal source abt ? abort request/indication ? logical and + ? logical or
peb 2465 appendix semiconductor group 72 02.97 10.1.4 state diagram of the sicofi ? -4 monitor receiver figure 34 mr ? mr - bit calculated and transmitted on du-line mx ? mx - bit received data downstream (dd-line) ll ? last lock of monitor byte received on dd-line abt ? abort indication to internal source ? logical and + ? logical or
peb 2465 appendix semiconductor group 73 02.97 10.1.5 monitor channel data structure the monitor channel is used for the transfer of maintenance information between two functional blocks. by use of two monitor control bits (mr and mx) per direction, the data are transferred in a complete handshake procedure. address byte messages to and from the sicofi-4 are started with the following monitor byte: thus providing information for two voice channels, the sicofi-4 is one device on one iom-2 timeslot. monitor data for a specific voice channel is selected by the sicofi-4 specific command (sop or cop). identification command in order to be able to unambiguously identify different devices by software, a two byte identification command is defined for analog lines iom-2 devices. each device will then respond with its specific identification code. for the sicofi-4 this two byte identification code is: each byte is transferred at least twice (in two consecutive frames). bit76543210 10000001 10000000 00000000 10000000 10000010
peb 2465 appendix semiconductor group 74 02.97 10.2 iom ? -2 interface programming procedure example for a typical iom-2 interface programming procedure, consisting of identification request and answer, a sop write command with three byte following, and sop read to verify the programming. table 15 frame data down data up monitor mr/mx monitor mr/mx 1 11111111 11 11111111 11 2 idrqt. 1 st byte 10 11111111 11 3 idrqt. 1 st byte 10 11111111 01 4 idrqt. 2 nd byte 11 11111111 01 5 idrqt. 2 nd byte 10 11111111 11 6 11111111 11 11111111 01 7 11111111 11 idans. 1 st byte 10 8 11111111 01 idans. 1 st byte 10 9 11111111 01 idans. 2 nd byte 11 10 11111111 11 idans. 2 nd byte 10 11 11111111 01 11111111 11 12 address 10 11111111 11 13 address 10 11111111 01 14 sop write 11 11111111 01 15 sop write 10 11111111 11 16 cr3 11 11111111 01 17 cr3 10 11111111 11 18 cr2 11 11111111 01 19 cr2 10 11111111 11 20 cr1 11 11111111 01 21 cr1 10 11111111 11 22 sop read 11 11111111 01 23 sop read 10 11111111 11 24 11111111 11 11111111 01 25 11111111 11 address 10 26 11111111 01 address 10
peb 2465 appendix semiconductor group 75 02.97 idrqt ? identification request (80 h , 00 h ) idans ? answer to identification request (80 h , 82 h ) address ? sicofi-4 specific address byte (81 h ) crx ? data for/from configuration register x. 27 11111111 01 cr3 11 28 11111111 11 cr3 10 29 11111111 01 cr2 11 30 11111111 11 cr2 10 31 11111111 01 cr1 11 32 11111111 11 cr1 10 33 11111111 01 11111111 11 table 15 (contd) frame data down data up monitor mr/mx monitor mr/mx
peb 2465 appendix semiconductor group 76 02.97 10.3 test features 10.3.1 boundary scan general the sicofi-4 provides fully ieee std. 1149.1 compatible boundary scan support consisting of: C a complete boundary scan (digital pins) C a test access port controller (tap) C four dedicated pins (tck, tms, tdi, tdo) C a 32 bit icode register all sicofi-4 digital pins expect power supply vddd and ground gndd are included in the boundary scan. depending on the pin functionality one, two or three boundary cells are provided. when the tap controller is in the appropriate mode, data is shifted into/out of the boundary scan via the pins tdi/tdo controlled by the clock applied to pin tck. the sicofi-4 pins are included in the following sequence in the boundary scan: table 16 pin type number of boundary scan cells usage input 1 input output 2 output, enable i/o 3 input, output, enable table 17 pin no. pin name type 57 mode i 59 tss1 i 60 tss0 i 61 si3_2 i 62 si3_1 i 63 si3_0 i 64 sb3_1 i/o 1 sb3_0 i/o 2 so3_2 o 3 so3_1 o
peb 2465 appendix semiconductor group 77 02.97 4 so3_0 o 13 so4_0 o 14 so4_1 o 15 so4_2 o 16 sb4_0 i/o 17 sb4_1 i/o 18 si4_0 i 19 si4_1 i 20 si4_2 i 21 lgkm1 o 22 reset i 24 dd i 25 du o (open drain) 26 dcl i 27 fsc i 28 lgkm0 o 29 si1_2 i 30 si1_1 i 31 si1_0 i 32 sb1_1 i/o 33 sb1_0 i/o 34 so1_2 o 35 so1_1 o 36 so1_0 o 45 so2_0 o 46 so2_1 o 47 so2_2 o 48 sb2_0 i/o 49 sb2_1 i/o 50 si2_0 i 51 si2_1 i 52 si2_0 i table 17 (contd) pin no. pin name type
peb 2465 appendix semiconductor group 78 02.97 10.3.2 the tap-controller the test access port (tap) controller implements the state machine defined in the jtag standard ieee std. 1149.1. transitions on pin tms (test mode select) cause the tap controller to perform a state change. according to the standard definition five instructions are executable: figure 35
peb 2465 appendix semiconductor group 79 02.97 extest : is used to examine the board interconnections. intest: supports internal chip testing (is the default value of the instruction register) sample/preload: provides a snap-shot of the pin level during normal operation, or is used to preload the boundary scan with a test vector icode: the 32 bit identification register is serially read out via tdo. it contains a version number (4 bit), a device code (16 bit) and the manufacture code (11 bit). the lsb is fixed to 1. for the sicofi-4 v2.2 and v2.3 the code is: 0011 0000 0000 0001 0101 0000 1000 001 1 tap_test1 39 bit field for selecting operation (level metering offset, loops, tone generator ? ) tap_test2 : wait for level metering result ready (should be > t.b.d. ms) tap_test5: level metering data output (1 bit result of level metering per channel) tap_test4: level metering operation is switched off bypass: a bit entering tdi is shifted to tdo after one tck clock cycle table 18 code instruction function 0000 extest external testing 0001 intest internal testing 0010 sample/ preload snap-shot testing 0011 icode reading id code 0100 tap_test 1 configuration for level metering 0101 tap_test 2 wait for result 1000 tap_test 5 serial testdata output (level metering results) 0111 tap_test 4 switch off test 11xx bypass bypass operation
peb 2465 appendix semiconductor group 80 02.97 10.3.3 level metering function the level metering function is a functional selftest (available per channel), which allows selftest of the chip (digital, or digital and analogue), and also selftest of the board (including the slic). an external or internally generated sine-wave signal is fed to the receive path. after switching a loop (internal or external via the slic) to the transmit-path the return level is measured and compared to a programmable offset value. the result of this operation (greater or smaller than offset) can be read out via the iom-2 interface (bit lmr in configuration register cr2). there is a single 8 bit offset-register available for all the 4 channels. this offset register can be accessed as xr4 with a xop-command (field lsel = 100) this register contains the 2s complement offset value for the level metering function. bit76543210 of7 of6 of5 of4 of3 of2 of1 of0
peb 2465 appendix semiconductor group 81 02.97 figure 36 block diagram (for further information, an application-note describing the calculation of the offset value and the sensitivity, is available)
peb 2465 appendix semiconductor group 82 02.97 10.3.4 using the level metering function task an external sine wave (applied to the analog input pin v in ) or an internally generated sine wave signal (via tone generator tg1 or via test loops) is send to the sicofi-4 transmit path. this signal will be rectified and the power of this signal will be compared to the programmable offset value of the level metering function. if the measured power exceeds a certain value the lmr bit of the register cr2 is set to 1. in the appendix you will find a printout of the track file to test the sicofi-4 level metering function. the following steps show how to detect a sine wave with a frequency of 2 khz and a pcm level l = 0 db (like measured with the pcm4 in the a/d measurement). step 1 the sicofi-4 extended register xr4 holds the offset value for the level metering function. with the qsicos utility program calculation of level metering function the programming byte for this register xr4 can be calculated. in our case the level l will be 0 db. bytes for level metering register xr4: 71 step 2 the level metering function is always used together with a bandpass filter. the programming of this bandpass filter has to be done by programming the tone-generator coefficients of the tone generator tg2. (during level metering function enabled, tg2 is not available). for this example the coefficients of the tg2 for a frequency of f = 2000 hz have to be calculated using the qsicos utility program calculate tone generator coefficients: bytes for tone generator 2 (0d): 00, 80, 40, 09 step 3 the sicofi-4 extended register xr4 has to be programmed. step 4 in the sicofi-4 configuration register cr2 the level metering bit lm has to be set to 1 and the programmed frequency for the tone generator 2 has to chosen by setting the ptg2 bit to 1. example for writing the cr2 register: 0 0 1 0 0 0 1 0 = 22 h (a-law is selected)
peb 2465 appendix semiconductor group 83 02.97 step 5 after sending the sine wave in the sicofi-4 transmit path the result of the level metering function will be present in the lmr bit of the configuration register cr2. examples for reading back the cr2 register: 0 0 1 0 0 0 1 0 = 22 h level was lower than reference 0 0 1 1 0 0 1 0 = 32 h level was higher than reference step 6 by programming different levels for the level metering function the actual pcm coded level can be found. also a change of the ax1 gain filter will change the pcm level in the transmit path. if an analog signal is applied to the sicofi-4 analog input, the level of this analog signal can be calculated. to calculate the analog level, the gain setting of the sicofi-4 filters together with the 0 dbm0 reference voltage have to be taken into account.
peb 2465 appendix semiconductor group 84 02.97 10.4 programming the sicofi ? -4 tone generators two independent tone generators are available per channel. when one or both tone-generators are switched on, the voice signal is switched off automatically for the selected voice channel. to make the generated signal sufficient for dtmf, a programmable bandpass-filter is included. the default frequency for both tone generators is 1000 hz. the qsicos-program contains a program for generating coefficients for variable frequencies. byte sequences for programming both the tone generators and the bandpass-filters: the resulting signal amplitude can be set by transmitting the ar1 and ar2 filters. by switching a digital loop the generated sine-wave signal can be fed to the transmit path. 1) 0c is used for programming tone generator 1, in channel 1(3). 0d is used for programming tone generator 2, in channel 1(3). table 19 frequency command byte 1 byte 2 byte 3 byte 4 697 hz 0c/0d 1) 0a 33 5a 2c 770 hz 0c/0d 1) 12 33 5a c3 852 hz 0c/0d 1) 13 3c 5b 32 941 hz 0c/0d 1) 1d 1b 5c cc 1209 hz 0c/0d 1) 32 32 52 b3 1336 hz 0c/0d 1) ec 1d 52 22 1477 hz 0c/0d 1) aa ac 51 d2 800 hz 0c/0d 1) 12 d6 5a c0 950 hz 0c/0d 1) 1c f0 5c c0 1008 hz 0c/0d 1) 1a ae 57 70 2000 hz 0c/0d 1) 00 80 50 09
peb 2465 proposed test circuit semiconductor group 85 02.97 11 proposed test circuit figure 37
peb 2465 board layout recommendation semiconductor group 86 02.97 12 board layout recommendation 12.1 board layout keep in mind that inside the sicofi-4 all the different v dd -supplies are connected via the substrate of the chip, and the areas connected to different grounds are separated on chip. a) separate all digital supply lines from analog supply lines as long as possible. b) use a separate gnd-connection for the capacitors which are filtering the reference voltage (220 nf ceramic-capacitor at v h12 / v h34 ). c) dont use a common ground-plane under the sicofi-4. d) use a large ground-plane (distant from the sicofi-4) and use different ground lines for connecting the sicofi-4: one common analog ground and a separate digital ground. 12.2 filter capacitors a) to achieve a good filtering for the high frequency band, place smd ceramic-capaci- tors with 100 nf from v dda12 and v dda34 to gnda. b) one 100 nf smd ceramic-capacitor is needed to filter the digital supply ( v ddd to gndd). c) use 220 nf ceramic-capacitors to connect v h12 and v h34 to analog ground. d) place all filter capacitors as close as possible to the sicofi-4 (most important!!!). e) use one central tantalum-capacitor with about 1 m f to 10 m f to block v dd to gnd.
peb 2465 board layout recommendation semiconductor group 87 02.97 figure 38
peb 2465 package outlines semiconductor group 88 02.97 13 package outlines plastic package, p-mqfp-64 (smd) (plastic metric quad flat package) gpm05250 sorts of packing package outlines for tubes, trays etc. are contained in our data book package information dimensions in mm smd = surface mounted device

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