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this is information on a product in full production. september 2013 docid18305 rev 3 1/40 1 tda7718b 3 band car audio processor datasheet - production data features ? input multiplexer ? qd1: quasi-differential stereo inputs ? se1: stereo single-ended input ? se2: stereo single-ended input ? se3: stereo single-ended input ? fd full-differential or quasi-differential input ? loudness ?2 nd order frequency response ? programmable center frequency (400 hz / 800 hz / 2400 hz) ? 15db with 1db steps ? selectable high frequency boost ? selectable flat-mode (constant attenuation) ? volume ? +23 db to -31 db with 1 db step resolution ? soft-step control with programmable blend times ? bass ?2 nd order frequency response ? center frequency programmable in 4 steps (60 hz / 80 hz / 100 hz / 200 hz) ? q programmable 1.0/1.25/1.5/2.0 ? dc gain programmable ? -15 db to 15 db range with 1 db resolution ? middle ?2 nd order frequency response ? center frequency programmable in 4 steps (500 hz / 1 khz / 1.5 khz / 2.5 khz) ? q programmable 0.75/1.0/1.25 ? -15 db to 15 db range with 1 db resolution ? treble ?2 nd order frequency response (10 khz / 12.5 khz / 15 khz / 17.5 khz) ? center frequency programmable in 4 steps (10 khz / 12.5 khz / 15 khz / 17.5 khz) ? -15 db to 15 db with 1 db resolution ? speaker ? 4 independent soft-step speaker controls ? +15 db to -79 db with 1 db steps ? direct mute ? subwoofer ?2 nd order low pass filter with programmable cut off frequency (55 hz / 85 hz / 120 hz / 160 hz) ? 2 independent soft-step level control, +15 db to ?79 db with 1 db steps ? mute functions ? direct mute ? digitally controlled soft-mute with 4 programmable mute-times (0.48 ms/0.96 ms/8 ms/16 ms) ? offset detection ? offset voltage detection circuit for on-board power amplifier failure diagnosis description the tda7718b is a high performance signal processor specifically designed for car radio applications. the device includes a high performance audioprocessor with fully integrated audio filters and new soft-step architecture. the digital control allows programming in a wide range of filter characteristics. *$3*36 tssop28 table 1. device summary order code package packing tda7718b tssop28 tube TDA7718BTR tssop28 tape and reel www.st.com
contents tda7718b 2/40 docid18305 rev 3 contents 1 block circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 pin connection and pin descripti on . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1 pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.1 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.2 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.3 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4 description of the audi oprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.1 input stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.1.1 quasi-differential stereo input (qd1) . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.1.2 single-ended stereo input (se1, se2, se3) . . . . . . . . . . . . . . . . . . . . . 13 4.1.3 full-differential or quasi-differential stereo input (fd/qd2) . . . . . . . . . . 13 4.2 loudness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.2.1 loudness attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.2.2 peak frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.2.3 high frequency boost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.2.4 flat mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.3 soft-mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.4 soft-step volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.5 bass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.5.1 bass attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.5.2 bass center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.5.3 quality factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.5.4 dc mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.6 middle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.6.1 middle attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.6.2 middle center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.6.3 quality factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.7 treble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
docid18305 rev 3 3/40 tda7718b contents 4.7.1 treble attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4.7.2 center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.8 subwoofer filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.9 soft-step control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.10 dc offset detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 4.11 audioprocessor testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 4.12 application note . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 5i 2 c bus specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 5.1 interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 5.2 i 2 c bus electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 5.2.1 receive mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 5.2.2 transmission mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 5.2.3 reset condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 5.3 data byte specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 6 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 7 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
list of tables tda7718b 4/40 docid18305 rev 3 list of tables table 1. device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 table 2. pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 table 3. thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 table 4. absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 table 5. electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 table 6. i 2 c bus electrical characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 table 7. subaddress (receive mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 table 8. main selector (0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 table 9. soft-mute / others (4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 table 10. soft-step i (5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 table 11. soft-step ii / dc detector (6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 table 12. loudness (7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 table 13. volume / output gain (8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 table 14. treble filter (9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 table 15. middle filter (10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 table 16. bass filter (11). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 table 17. subwoofer / middle / bass (12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 table 18. speaker attenuation (fl/fr/rl/rr/swl/swr) (13-18) . . . . . . . . . . . . . . . . . . . . . . . . . . 36 table 19. testing audio processor 1 (19) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 table 20. testing audio processor 2 (20) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 table 21. testing audio processor 3 (21) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 table 22. document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
docid18305 rev 3 5/40 tda7718b list of figures list of figures figure 1. block circuit diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 figure 2. pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 figure 3. fd/qd block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 figure 4. loudness attenuation @ fp = 400 hz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 figure 5. loudness center frequencies @ attn. = 15 db.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 figure 6. loudness attenuation, f c = 2.4 khz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 figure 7. soft-mute timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 figure 8. bass control @ fc = 80 hz, q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 figure 9. bass center frequencies @ gain = 14 db, q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 figure 10. bass quality factors @ gain = 14 db, f c = 80 hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 figure 11. bass normal and dc mode @ gain = 14 db, f c = 80 hz . . . . . . . . . . . . . . . . . . . . . . . . . . 19 figure 12. middle control @ fc = 1 khz, q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 figure 13. middle center frequencies @ gain = 14 db, q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 figure 14. middle quality factors @ gain = 14 db, f c = 1 khz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 figure 15. treble control @ fc = 17.5 khz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 figure 16. treble center frequencies @ gain = 14 db . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 figure 17. subwoofer cut frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 figure 18. dc offset detection circuit (simplified) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 figure 19. application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 figure 20. i 2 c bus interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 figure 21. i 2 c bus data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 figure 22. tssop28 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
block circuit diagram tda7718b 6/40 docid18305 rev 3 1 block circuit diagram figure 1. block circuit diagram 62)7 087( /28'1(66 68%:22)(5 92/80( 087( 75(%/( 0,''/( 6833/< 0$,1,138708/7,3/(;(5 ',*,7$/ &21752/ , &%86 %$66 6(/ 6(5 6(/ 6(5 6(/ 6(5 4'/ 4'* 4'5 )'/4'/ )'/4'* )'54'* )'54'5 287/) 2875) 287/5 28755 2876:/ 2876:5 :,1b,1 6'$ 6&/ 9&& *1' &5() :,1b7& '&b(55 '&2iivhw 'hwhfwru 0212)$'(5 0212)$'(5 0212)$'(5 0212)$'(5 0212)$'(5 0212)$'(5 *$3*36
docid18305 rev 3 7/40 tda7718b pin connection and pin description 2 pin connection and pin description 2.1 pin connection figure 2. pin connection (top view) 2.2 pin description 6(/ 6(5 6(/ 6(5 6(/ 4'/ 6(5 4'* 4'5 287/5 287/) :,17& 9&& 087( 6&/ 6'$ '&(uu :lqlq )'/4'/ 28755 )'/4'* )'54'* )'54'5 2876:5 2876:/ 2875) &5() *1' *$3*36 table 2. pin description no. pin name description i/o 1 se1l single-end input left i 2 se1r single-end input right i 3 se2l single-end input left i 4 se2r single-end input right i 5 se3l single-end input left i 6 se3r single-end input right i 7 qd1l quasi-differential stereo inputs left i 8 qd1g quasi-differential stereo inputs common i 9 qd1r quasi-differential stereo inputs right i 10 fd1l+/qd2l full differential + input left or quasi-differential left i
pin connection and pin description tda7718b 8/40 docid18305 rev 3 note: the l & r channels may be swapped as per the user's wishes making use of proper connections to the device pins, with no impact on electrical performance. software control has to take into account the external routing and be designed accordingly. 11 fd1l-/qd2g full differential - input left or quasi-differential ground i 12 fd1r-/qd2g full differential - input right or quasi-differential ground i 13 fd1r+/qd2r full differential + input right or quasi-differential right i 14 cref reference capacitor o 15 gnd ground s 16 outswr subwoofer right output o 17 outswl subwoofer left output o 18 outrf front right output o 19 outrr rear right output o 20 outlr rear left output o 21 outlf front left output o 22 wintc dc offset detector filter output o 23 mute external mute pin i 24 vcc supply s 25 scl i 2 c bus clock i 26 sda i 2 c bus data i/o 27 dc_err dc offset detector output o 28 win_in dc offset detector input i table 2. pin description (continued) no. pin name description i/o
docid18305 rev 3 9/40 tda7718b electrical specifications 3 electrical specifications 3.1 thermal data 3.2 absolute maximum ratings 3.3 electrical characteristics v s = 8.5 v; t amb = 25 c; r l = 10 k ? ; all gains = 0 db; f = 1 khz; unless otherwise specified table 3. thermal data symbol description value unit r th-j amb thermal resistance junction-to-ambient 114 c/w table 4. absolute maximum ratings symbol parameter value unit v s operating supply voltage 10.5 v v in_max maximum voltage for signal input pins 7 v t amb operating ambient te mperature -40 to 85 c t stg storage temperature range -55 to 150 c table 5. electrical characteristics symbol parameter test condition min. typ. max. unit supply v s supply voltage - 7.5 8.5 10 v i s supply current - 23 29 35 ma input selector r in input resistance all single ended inputs 70 100 130 k ? v cl clipping level input gain = 0 db 2 - - v rms s in input separation - - 95 - db differential stereo inputs r in input resistance differential 70 100 - k ? cmrr common mode rejection ratio for main source v cm = 1 v rms @ 1 khz 44 60 - db v cm = 1 v rms @ 10 khz 44 60 - db e no output noise @ speaker outputs 20 hz - 20 khz, a-weighted; all stages 0 db -1222v
electrical specifications tda7718b 10/40 docid18305 rev 3 loudness control a max max attenuation - 14 15 16 db a step step resolution - 0.5 1 1.5 db f peak peak frequency f p1 - 400 - hz f p2 - 800 - hz f p3 - 2400 - hz volume control g max max gain - 22 23 24 db a max max attenuation - - -31 -30 db a step step resolution - 0.5 1 1.5 db e a attenuation set error - -0.75 0 +0.75 db e t tracking error - - - 2 db v dc dc steps adjacent attenuation steps -3 0.1 3 mv from 0 db to g min -5 0.5 5 mv soft-mute a mute mute attenuation - 80 100 - db t d delay time t1 0.35 0.48 0.65 ms t2 0.7 0.96 1.3 ms t3 5.6 7.6 9.6 ms t4 12.3 15.3 18.3 ms v th low low threshold for sm pin - - - 1 v v th high high threshold for sm pin - 2.5 - - v r pu internal pull-up resistor - 32 45 58 k ? v pu internal pull-up voltage - 3 3.3 3.6 v bass control fc center frequency f c1 -60 -hz f c2 -80 -hz f c3 - 100 - hz f c4 - 200 - hz q bass quality factor q 1 -1 - - q 2 -1.25 - - q 3 -1.5 - - q 4 -2 - - c range control range - 14 15 16 db a step step resolution - 0.5 1 1.5 db dc gain bass-dc-gain dc = off -1 0 +1 db dc = on, gain = 15 db 4.3 4.7 5.1 db table 5. electrical ch aracteristics (continued) symbol parameter test condition min. typ. max. unit
docid18305 rev 3 11/40 tda7718b electrical specifications middle control c range control range - 14 15 16 db a step step resolution - 0.5 1 1.5 db f c center frequency f c1 - 500 - hz f c2 -1 -khz f c3 -1.5 -khz f c4 -2.5 -khz q middle quality factor q 1 -0.75 - - q 2 -1 - - q 3 -1.25 - - treble control c range clipping level - 14 15 16 db a step step resolution - 0.5 1 1.5 db f c center frequency f c1 - 10 - khz f c2 - 12.5 - khz f c3 - 15 - khz f c4 - 17.5 - khz speaker attenuators g max max gain - 14 15 16 db a max max attenuation - - -79 -74 db a step step resolution - 0.5 1 1.5 db a mute mute attenuation - 80 90 - db e e attenuation set error - - - 2 db v dc dc steps adjacent attenuation steps - 0.1 5 mv audio outputs v cl clipping level d = 0.3 %; byte8_d6=1 2 - - v rms d = 1 %; byte8_d6=0 2.2 - - v rms r out output impedance - - 20 100 w r l output load resistance - 2 - - k ? c l output load capacitor - - - 10 nf v dc dc voltage level - 3.8 4.0 4.2 v subwoofer lowpass f lp lowpass corner frequency f lp1 -55 -hz f lp2 -85 -hz f lp3 - 120 - hz f lp4 - 160 - hz table 5. electrical ch aracteristics (continued) symbol parameter test condition min. typ. max. unit
electrical specifications tda7718b 12/40 docid18305 rev 3 dc offset detection circuit v th zero comp. window size v1 10 25 40 mv v2 30 50 70 mv v3 50 75 100 mv v4 70 100 130 mv t sp max rejected spike length -21130s - 5 22 50 s -103370s -154490s i chdcerr dcerr charge current - 2 5 8 a i disdcerr dcerr discharge current - 4 5 9 ma v outh dcerr high voltage - 3 3.3 3.6 v v outl dcerr low voltage - - 100 300 mv general e no output noise bw=20 hz to 20 khz a- weighted, all gain = 0 db -1222v bw=20 hz - 20 khz a- weighted, output muted - 7 12 v s/n signal to noise ratio all gain = 0 db, a-weighted; v o = 2 v rms 98 104 - db ddistortion v in =1 v rms; all stages 0 db - 0.01 0.1 % s c channel separation left/right - - 90 - db table 5. electrical ch aracteristics (continued) symbol parameter test condition min. typ. max. unit
docid18305 rev 3 13/40 tda7718b description of the audioprocessor 4 description of the audioprocessor 4.1 input stages one quasi-differential stereo input, one full-di fferential/quasi-differential stereo input and three single-ended inputs are available. 4.1.1 quasi-differential stereo input (qd1) the qd input is implemented as a buffered quasi-differential stereo stage with 100 k ? input- impedance at each input. there is -3 db attenuation at qd input stage. 4.1.2 single-ended stereo input (se1, se2, se3) the input-impedance at each input is 100 k ? and the attenuation is fixed to -3 db for incoming signals. 4.1.3 full-differential or quasi-dif ferential stereo input (fd/qd2) this device provides a full-differential stereo input stage (fd) or 2 nd quasi-differential stereo input stage. the full differential is a buffered full-differential stereo stage with 100 k ? input- impedance at each input. when using as qd 2 application, it needs to connect the two qd2g pins together from external and the input impedance at qdg becomes 50 k ? . there is -3 db attenuation at the input stage. figure 3 shows the block diagram of this input stage.
description of the audioprocessor tda7718b 14/40 docid18305 rev 3 figure 3. fd/qd block diagram 4.2 loudness there are four parameters programmable in the loudness stage. )' 4' g% g% )'/b4'/ )'/b4'/* 4'287/ 4'2875 )'5b4'5* )'5b4'5 )' 4' *$3*36
docid18305 rev 3 15/40 tda7718b description of the audioprocessor 4.2.1 loudness attenuation figure 4 shows the attenuation as a function of frequency at f p = 400 hz. figure 4. loudness attenuation @ f p = 400 hz. 4.2.2 peak frequency figure 5 shows the four possible peak-frequencies at 400, 800 and 2400 hz. figure 5. loudness center frequencies @ attn. = 15 db. &requency;(z= -agnitude;d"= *$3*36 *$3*36 &requency;(z= -agnitude;d"=
description of the audioprocessor tda7718b 16/40 docid18305 rev 3 4.2.3 high frequency boost figure 6 shows the different loudness shapes in low and high frequency boost. figure 6. loudness attenuation, f c = 2.4 khz 4.2.4 flat mode in flat mode the loudness stage wo rks as a 0 db to -15 db attenuator. 4.3 soft-mute the digitally controlled soft-mute stage a llows muting/demuting the signal with a i 2 c bus programmable slope. the mute process can either be activated by the soft-mute pin or by the i 2 c bus. this slope is realized in a special s-shaped curve to mute slow in the critical regions (see figure 7 ). for timing purposes the bit 0 of the i 2 c bus output register is set to 1 from the start of muting until the end of demuting. figure 7. soft-mute timing note: please notice that a started mute-action is always terminated and could not be interrupted by a change of the mute ?signal. *$3*36 &requency;(z= -agnitude;d"= *$3*36 %84 -54% 3)'.!, 2%& 3)'.!, ) #"53 /54 4ime
docid18305 rev 3 17/40 tda7718b description of the audioprocessor 4.4 soft-step volume when the volume-level is changed audible clicks could appear at the output. the root cause of those clicks could either be a dc-offset befo re the volume-stage or the sudden change of the envelope of the audio signal. with the soft -step-feature both kinds of clicks could be reduced to a minimum and are no more audible. the blend-time from one step to the next is programmable as 5 ms or 10 ms. the soft-step control is described in detail in chapter 4.9 . 4.5 bass there are four parameters programmable in the bass stage: 4.5.1 bass attenuation figure 8 shows the attenuation as a function of frequency at a center frequency of 80 hz. figure 8. bass control @ f c = 80 hz, q = 1 *$3*36 &requency;(z= -agnitude;d"=
description of the audioprocessor tda7718b 18/40 docid18305 rev 3 4.5.2 bass center frequency figure 9 shows the four possible center frequencies 60, 80, 100 and 200 hz. figure 9. bass center frequencies @ gain = 14 db, q = 1 4.5.3 quality factors figure 10 shows the four possible quality factors 1, 1.25, 1.5 and 2. figure 10. bass quality factors @ gain = 14 db, f c = 80 hz *$3*36 &requency;(z= -agnitude;d"= *$3*36 &requency;(z= -agnitude;d"=
docid18305 rev 3 19/40 tda7718b description of the audioprocessor 4.5.4 dc mode in this mode the dc-gain is increased by 4.4 db. in addition the programmed center frequency and quality factor is decreased by 25 % which can be used to reach alternative center frequencies or quality factors. figure 11. bass normal and dc mode @ gain = 14 db, f c = 80 hz 1. the center frequency, q and dc-mode can be set fully independently. 4.6 middle there are three parameters programmable in the middle stage: *$3*36 &requency;(z= -agnitude;d"=
description of the audioprocessor tda7718b 20/40 docid18305 rev 3 4.6.1 middle attenuation figure 12 shows the attenuation as a function of frequency at a center frequency of 1 khz. figure 12. middle control @ f c = 1 khz, q = 1 4.6.2 middle center frequency figure 13 shows the four possible center freque ncies 500 hz, 1 khz, 1.5 khz and 2.5 khz. figure 13. middle center frequencies @ gain = 14 db, q = 1 *$3*36 &requency;(z= -agnitude;d"= *$3*36 &requency;(z= -agnitude;d"=
docid18305 rev 3 21/40 tda7718b description of the audioprocessor 4.6.3 quality factors figure 14 shows the three possible quality factors 0.75, 1 and 1.25. figure 14. middle quality factors @ gain = 14 db, f c = 1 khz 4.7 treble there are two parameters programmable in the treble stage: 4.7.1 treble attenuation figure 15 shows the attenuation as a function of frequency at a center frequency of 17.5 khz. figure 15. treble control @ f c = 17.5 khz. *$3*36 &requency;(z= -agnitude;d"= *$3*36 &requency;(z= -agnitude; d"=
description of the audioprocessor tda7718b 22/40 docid18305 rev 3 4.7.2 center frequency figure 16 shows the four possible center frequencies 10 k, 12.5 k, 15 k and 17.5 khz. figure 16. treble center frequencies @ gain = 14 db 4.8 subwoofer filter the subwoofer lowpass filter has butterwort h characteristics with programmable cut-off frequency (55 hz / 85 hz / 120 hz / 160 hz). the output phase can be selected between 0 deg and 180 deg. the input of subwoofer takes signal from bass filter output or output of input mux. figure 17. subwoofer cut frequencies *$3*36 &requency;(z= -agnitude;d"= *$3*36 &requency;(z= -agnitude;d"=
docid18305 rev 3 23/40 tda7718b description of the audioprocessor 4.9 soft-step control in this device, the soft-step function is av ailable for volume, speaker, loudness, treble, middle and bass block. with soft-step function, the audible noise of dc offset or the sudden change of signal can be avoided when adjusting gain setting of the block. for each block, the soft-step func tion is controlled by soft-step soft-step on/off control bit in the control table. the soft-step transient time selection (5 ms or 10 ms) is common for all blocks and it is controlled by soft-step time c ontrol bit. the soft-step operation of all blocks has a common centralized control. in this case, a new soft-step operation can not be started before the completion previous soft-step. there are two different modes to activate the soft-step operation. the soft-step operation can be started right after i 2 c data sending, or the soft-step can be activated in parallel after data sending of several different blocks. the tw o modes are controlled by the ?act bit? (it is normally bit7 of the byte.) of each byte. when act bit is ?0?, which means action, the soft-step is activated right after the date byte is sen t. when the act bit is ?1?, which means wait, the block goes to wait for soft-step status. in this case, the block will wait for some other block to activate the operation. the so ft-step operation of all blocks in wait status will be done together with the block which ac tivate the soft-step. with this mode, all specific blocks can do the soft-step in parallel. this avoids waiting when the soft-step is operated one by one. | ? soft-step start here | ? soft-step start here for all chip addr sub addr 0xxxxxxx chip addr sub addr 1xxxxxxx 1xxxxxxx ...... 0xxxxxxx
description of the audioprocessor tda7718b 24/40 docid18305 rev 3 4.10 dc offset detector using the dc offset detection circuit ( figure 18 ) an offset voltage difference between the audio power amplifier and the apr's front and rear outputs can be detected, preventing serious damage to the loudspeakers. the circ uit compares whether the signal crosses the zero level inside the audio power at the same time as in the speaker cell. the output of the zero-window-comparator of the power amplifie r must be connected wit h the winin-input of the apr. the winin-input has an 50k ? internal pull-up resistor connected to 3.3 v. it is recommended to drive this pin with open-collector outputs only. to compensate for errors at low frequencies the wintc-pin are implemented, with external capacitors introducing the same delay ? = 7.5 k ? * c ext as the ac-coupling between the apr and the power amplifier introduces. for the zero window comparators, the time constant for spike rejection as well as the threshold are programmable. for electrical characteristics see chapter 3 on page 9 . a low-active dc-offset error signal appears at the dcerr output if the next conditions are both true: a) front and rear outputs are inside zero crossing windows. b) the input voltage vwinin is logic low whenever at least one output of the power amplifier is outside the zero crossing windows. after power-on, the external attached capacitor is rapidly charged (fast-charge) to overcome a false indication. figure 18. dc offset detection circuit (simplified) 287/) 2875) n n 9wk ,q=hur 9wk 9wk ,q=hur 9wk =hur:lqgrz&rps =hur:lqgrz&rps 287/5 28755 9wk ,q=hur 9wk 9wk ,q=hur 9wk =hur:lqgrz&rps 6slnhuhmhfwlrq + doolqvlgh]hurzlqgrz =hur:lqgrz&rps 9wk p ? '&huu &h[w wr ?3 :lqlq n n :lq7& &h[w *$3*36
docid18305 rev 3 25/40 tda7718b description of the audioprocessor 4.11 audioprocessor testing in the test mode, which can be acti vated by setting bit d7 of the i 2 c subaddress byte and bit d0 of the testing audioprocessor byte, several internal signals are available at the se1l pin. in this mode, the input resistance of 100 k ? is disconnected from the pin. internal signals available for testing are listed in the data-byte specification. figure 19. application schematic 4.12 application note above application schematic show s a proposal typical application that qd1 and fd/qd2 is used as external signal sources. to limit the leakage current from signal source a 1 k ? resistor is recommended to put between de-coupling capacitor and pin if the output impedance of external signal source is less than 1 k ? . it's guaranteed that all input pins (pin 1~13) will not be broken ev en if 2vrms input signal is applied to the pins when csp is power off. 76623 &5() )' /4'/ )'54'* )' 54'5 )'/ 4'* :q ,q '&( uu 6' $ 6&/ 9& & 08 7( :, 17& *1' 28 7 / ) 28 7/5 28 755 28 76: 5 28 76:/ 28 75) q) ?) x) 6(/ 6( 5 6(/ 4' * 4' / 6(5 6(/ 6( 5 4' 5 ? ? ? x $xglr 3o d\huv q ) q ) q ) q ) q ) q ) q) q) ? ) ([whuqdo 6l jqdo 6rxufhv q) q ) q) q) q) q) 3rzhu $p solhuv 0lfursurfhvvru ? ) n 7 n 7 n 7 n 7 n 7 n 7 *$3*36
i 2 c bus specification tda7718b 26/40 docid18305 rev 3 5 i 2 c bus specification 5.1 interface protocol the interface protocol comprises: ? a start condition (s) ? a chip address byte (the lsb det ermines read/write transmission) ? a subaddress byte ? a sequence of data (n-bytes + acknowledge) ? a stop condition (p) ? the max. clock speed is 400 kbit/s ? 3.3 v logic compatible figure 20. i 2 c bus interface protocol s = start ack = acknowledge 5.2 i 2 c bus electrical characteristics *$3*36 ' ' ' ' ' ' ' ' gdwdq ' 6$ , 6 6'$ 6&/ 6$ 6$ 6$ 6$ ' ' ' ' ' ' ' gdwd $&. $&. vxedgguhvv fklsdgguhvv table 6. i 2 c bus electrical characteristics symbol parameter min max unit f scl scl clock frequency - 400 khz vih high level input voltage 2.4 - v vil low level input voltage - 0.8 v t hd,sta hold time for start 0.6 - s t su,sto setup time for stop 0.6 - s t low low period for scl clock 1.3 - s t high high period for scl clock 0.6 - s t f fall time for scl/sda - 300 ns t r rise time for scl/sda - 300 ns t hd,dat data hold time 0 - ns t su,dat data setup time 100 - ns
docid18305 rev 3 27/40 tda7718b i 2 c bus specification figure 21. i 2 c bus data 5.2.1 receive mode s = start r/w = "0" -> receive mode (chip can be programmed by p) "1" -> transmission mode (data could be received by p) ack = acknowledge p = stop ts = testing mode ai = auto increment 5.2.2 transmission mode sm = soft-mute activated for main channel bz = soft-step busy (?0? = busy) x = not used the transmitted data is automatic updated after each ack. transmission can be repeated without new chip address. 3$! 3#, w +'67$ w +''$7 w /2: w +,*+ w 68672 w 68'$7 w 5 w ) *$3*36 s 10 0010 0 r/w ac k ts x aia4a3a2a1a0ack dat a ack p s 1 0001 0 0 r/w ack x x x x x x bz sm ack p
i 2 c bus specification tda7718b 28/40 docid18305 rev 3 5.2.3 reset condition a power-on-reset is in voked if the supply voltage is below than 3.5 v. after that the registers are initialized to the defa ult data written in following tables. table 7. subaddress (receive mode) msb lsb function i2 i1 i0 a4 a3 a2 a1 a0 0 1 ------- testing mode off on -x------not used --0 1 --- - - auto increment mode off on ---00000main selector ---00001not used ---00010not used ---00011not used - - - 0 0 1 0 0 soft-mute / others ---00101soft-step i - - - 0 0 1 1 0 soft-step ii / dc-detector - - - 0 0 1 1 1 loudness - - - 0 1 0 0 0 volume / output gain ---01001treble ---01010middle ---01011bass - - - 0 1 1 0 0 subwoofer / middle / bass - - - 0 1 1 0 1 speaker attenuator left front - - - 0 1 1 1 0 speaker attenuator right front - - - 0 1 1 1 1 speaker attenuator left rear - - - 1 0 0 0 0 speaker attenuator right rear - - - 1 0 0 0 1 subwoofer attenuator left - - - 1 0 0 1 0 subwoofer attenuator right - - - 1 0 0 1 1 testing audio processor 1 - - - 1 0 1 0 0 testing audio processor 2 - - - 1 0 1 0 1 testing audio processor 3
docid18305 rev 3 29/40 tda7718b i 2 c bus specification 5.3 data byte specification not used (1-3) table 8. main selector (0) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 ----- 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 main source selector se1 se3 qd1 fd/ qd2 se2 mute mute mute ----0 1 --- fd / qd2 selection fd qd2 ---0 1 -- - - main source input gain select 0db 3db --0 1 -- - - - subwoofer flat off on xx - - - - - - not used
i 2 c bus specification tda7718b 30/40 docid18305 rev 3 table 9. soft-mute / others (4) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 ----- - - 0 1 soft-mute on off ----- -0 1 - pin influence for mute pin and iic iic ---- 0 0 1 1 0 1 0 1 -- soft-mute time 0.48 ms 0.96 ms 7.68 ms 15.36 ms ---0 1 -- - - subwoofer input source input mux bass output --0 1 -- - - - subwoofer enable (outswl & outswr) on off -0 1 --- - - - fast charge on off 0 1 ----- - - anti-alias filter on off (bypass)
docid18305 rev 3 31/40 tda7718b i 2 c bus specification table 10. soft-step i (5) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 ----- - - 0 1 loudness soft-step on off ----- - 0 1 - volume soft-step on off -----0 1 -- treble soft-step on off ----0 1 --- middle soft-step on off ---0 1 ---- bass soft-step on off --0 1 ----- speaker lf soft-step on off -0 1 ------ speaker rf soft-step on off 0 1 ------- speaker lr soft-step on off
i 2 c bus specification tda7718b 32/40 docid18305 rev 3 table 11. soft-step ii / dc detector (6) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 ----- - - 0 1 speaker rr soft-step on off ----- - 0 1 - subwoofer left soft-step on off -----0 1 -- subwoofer right soft-step on off ----0 1 --- soft-step time 5ms 10 ms -- 0 0 1 1 0 1 0 1 ---- zero-comparator window size 100 mv 75 mv 50 mv 25 mv 0 0 1 1 0 1 0 1 ------ spike rejection time constant 11 s 22 s 33 s 44 s
docid18305 rev 3 33/40 tda7718b i 2 c bus specification table 12. loudness (7) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 ---- 0 0 : 1 1 0 0 : 1 1 0 0 : 1 1 0 1 : 0 1 attenuation 0db -1 db : -14 db -15 db -- 0 0 1 1 0 1 0 1 -- - - center frequency flat 400 hz 800 hz 2400 hz -0 1 --- - - - high boost on off 0 1 ----- - - soft-step action act wait table 13. volume / output gain (8) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 -- 0 0 : 0 0 : 0 0 : 0 1 : 1 : 1 0 0 : 0 1 : 1 1 : 1 0 : 0 : 1 0 0 : 1 0 : 0 1 : 1 0 : 1 : 1 0 0 : 1 0 : 1 0 : 1 0 : 1 : 1 0 0 : 1 0 : 1 0 : 1 0 : 1 : 1 0 1 : 1 0 : 1 0 : 1 0 : 1 : 1 gain/attenuation +0 db +1 db : +15 db +16 db : +23 db not used : not used -0 db : -15 db : -31 db -0 1 --- - - - output gain 1db 0db 0 1 ----- - - soft-step action act wait
i 2 c bus specification tda7718b 34/40 docid18305 rev 3 table 14. treble filter (9) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 --- 0 0 : 0 0 1 1 : 1 1 0 0 : 1 1 1 1 : 0 0 0 0 : 1 1 1 1 : 0 0 0 0 : 1 1 1 1 : 0 0 0 1 : 0 1 1 0 : 1 0 gain/attenuation -15 db -14 db : -1 db 0db 0db +1 db : +14 db +15 db - 0 0 1 1 0 1 0 1 -- - - - treble center frequency 10.0 khz 12.5 khz 15.0 khz 17.5 khz 0 1 ----- - - soft-step action act wait table 15. middle filter (10) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 --- 0 0 : 0 0 1 1 : 1 1 0 0 : 1 1 1 1 : 0 0 0 0 : 1 1 1 1 : 0 0 0 0 : 1 1 1 1 : 0 0 0 1 : 0 1 1 0 : 1 0 gain/attenuation -15 db -14 db : -1 db 0db 0db +1 db : +14 db +15 db - 0 0 1 1 0 1 0 1 -- - - - middle q factor 0.75 1 1.25 reserved 0 1 ----- - - soft-step action act wait
docid18305 rev 3 35/40 tda7718b i 2 c bus specification table 16. bass filter (11) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 --- 0 0 : 0 0 1 1 : 1 1 0 0 : 1 1 1 1 : 0 0 0 0 : 1 1 1 1 : 0 0 0 0 : 1 1 1 1 : 0 0 0 1 : 0 1 1 0 : 1 0 gain/attenuation -15 db -14 db : -1 db 0db 0db +1 db : +14 db +15 db - 0 0 1 1 0 1 0 1 ----- bass q factor 1.0 1.25 1.5 2.0 0 1 ------- soft-step action act wait table 17. subwoofer / middle / bass (12) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 ----- - 0 0 1 1 0 1 0 1 subwoofer cut-off frequency 55 hz 85 hz 120 hz 160 hz -----0 1 -- subwoofer output phase 180 deg 0 deg --- 0 0 1 1 0 1 0 1 --- middle center frequency 500 hz 1000 hz 1500 hz 2500 hz - 0 0 1 1 0 1 0 1 -- - - - bass center frequency 60 hz 80 hz 100 hz 200 hz 0 1 ----- - - bass dc mode on off
i 2 c bus specification tda7718b 36/40 docid18305 rev 3 table 18. speaker attenuation (fl/fr/rl/rr/swl/swr) (13-18) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 - 0 0 : 0 0 0 : 1 1 1 0 0 : 0 0 0 : 0 0 1 0 0 : 0 1 1 : 1 1 x 0 0 : 1 0 0 : 1 1 x 0 0 : 1 0 0 : 1 1 x 0 0 : 1 0 0 : 1 1 x 0 1 : 1 0 1 : 0 1 x gain/attenuation 0db 1db : +15 db -0 db -1 db : -78 db -79 db mute 0 1 ----- - - soft-step action act wait table 19. testing audio processor 1 (19) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 ----- - - 0 1 audio processor testing mode off on --- 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 - test multiplexer at se1l (1) ssclk req smclk dcdet vth high dcdet vth low intzeroerr ref5v5 vgb1.95 clock200k sdclk vrefdco --0 1 -- - - - clock fast mode (2) on off -0 1 --- - - - clock source (2) external internal (200 khz) 0 1 ----- - - attenuator gain clock control (2) on off 1. the control bit needs both i 2 c test mode on & sub-address test mode on. 2. the control bit does not depend on test mode.
docid18305 rev 3 37/40 tda7718b i 2 c bus specification table 20. testing audio processor 2 (20) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 ----- - - 0 1 test architecture (1) normal split ----- - 0 1 - oscillator clock (2) 400 khz 800 khz -----0 1 -- soft-step curve (2) s-curve linear curve --- 0 0 1 1 0 1 0 1 --- manual set busy signal (1) auto auto 0 1 --- 0 0 1 1 0 1 0 1 --- request for clk generator (1) allow allow stopped stopped --0 1 -- - - - no dco spike rejection (1) on off xx - - - - - -not used 1. the control bit needs sub-address test mode on. 2. the control bit does not depend on test mode. table 21. testing audio processor 3 (21) msb lsb function d7 d6 d5 d4 d3 d2 d1 d0 ----- - - 0 1 enable clock for fl /fr/rl/rr/swl/swr on off ----- - 0 1 - enable clock for volume on off -----0 1 -- enable clock for treble and bass on off ----0 1 --- enable clock for loudness and middle on off xxxx- - - - not used
package information tda7718b 38/40 docid18305 rev 3 6 package information n order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack ? specifications, grade definitions a nd product status are available at: www.st.com . ecopack ? is an st trademark. figure 22. tssop28 mechanical data and package dimensions *$3*36 /54,).%!.$ -%#(!.)#!,$!4 ! $)- mm inch -) . 490 -!8 -). 490 -!8 ! ! ! b c $ % % e , , k ?plq?pd[ aa a .ote $and%doesnotincludemoldflashorprotrusions -old flashorpo trusions shallnot exceed mm inc h perside 433/0 $ 4hin3hrink3mall/utline0ackage *%$%#-/ !#
docid18305 rev 3 39/40 tda7718b revision history 7 revision history table 22. document revision history date revision changes 10-dec-2010 1 initial release. 26-feb-2013 2 added ?note? on page 8. 24-sep-2013 3 updated disclaimer.
tda7718b 40/40 docid18305 rev 3 please read carefully: information in this document is provided solely in connection with st products. stmicroelectronics nv and its subsidiaries (?st ?) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described he rein at any time, without notice. all st products are sold pursuant to st?s terms and conditions of sale. purchasers are solely responsible for the choice, selection and use of the st products and services described herein, and st as sumes no liability whatsoever relating to the choice, selection or use of the st products and services described herein. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. i f any part of this document refers to any third party products or services it shall not be deemed a license grant by st for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoev er of such third party products or services or any intellectual property contained therein. unless otherwise set forth in st?s terms and conditions of sale st disclaims any express or implied warranty with respect to the use and/or sale of st products including without limitation implied warranties of merchantability, fitness for a parti cular purpose (and their equivalents under the laws of any jurisdiction), or infringement of any patent, copyright or other intellectual property right. st products are not designed or authorized for use in: (a) safety critical applications such as life supporting, active implanted devices or systems wi th product functional safety requirements; (b) aeronautic applications; (c) automotive applications or environments, and/or (d) aerospace applications or environments. where st products are not designed for such use, the purchaser shall use products at purchaser?s sole risk, even if st has been informed in writing of such usage, unless a product is expressly designated by st as being intended for ?automotive, automotive safety or medical? industry domains according to st product design specifications. products formally escc, qml or jan qualified are deemed suitable for use in aerospace by the corresponding governmental agency. resale of st products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by st for the st product or service described herein and shall not create or extend in any manner whatsoev er, any liability of st. st and the st logo are trademarks or registered trademarks of st in various countries. information in this document supersedes and replaces all information previously supplied. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners. ? 2013 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - philippines - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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