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M44Cx90/M44Cx92
Low Current Microcontroller for Wireless Communication
The M44Cx90 and M44Cx92 are members of the TEMIC family of 4-bit single chip microcontrollers.
Features
D Programmable system-clock with prescaler and four
clock sources - 4-MHz crystal oscillator - RC-oscillator without external resistor - RC-oscillator adjustable with external resistor - External clock input
D 2-wire serial interface D Multi-functional timers / counters with
- IR remote control carrier generator - Biphase-, Manchester- and pulse width modulator - Biphase-, Manchester- and pulse width demodulator (only M44Cx92) - Phase control function (only M44Cx92)
D D D D D D D
32-kHz crystal oscillator Wide supply voltage range (1.8 V to 6.5 V) Very low sleep current (< 1 mA) 2/4 KByte ROM, 128
D Prescaler / interval timer D Watchdog, POR and brown-out function D Voltage monitoring D OTP M48C892 D SSO20-, SO20-, SO16- and SO8 (M44C090) package
4-bit RAM
512 bit EEPROM optional (M44C890/892) 12/16 bidirectional I/O's Up to 7 external / 7 internal interrupt sources
Application
The two MARC4 products M44C892/092 and M44C890/090 offer highest integration for IR and RF data communication, remote control and phase control. The M44C890/090 controller is optimized for the transmitter side and the M44C892/092 for the transmitter side as well as the receiver side. TEMIC's system know-how was used to integrate modulators and demodulators for commonly-used wireless protocols and phase control into the controllers. Both controllers perfectly match the RF front end device U2740B and the IR driver chip U426B. This - along with the very small SSO package and the approach to minimize the number of external components - leads to extremely compact remote control units, e.g., for electronic keys. Finally, the very low current consumption and the extended supply voltage range optimizes battery life time. Development is supported with the OTP M48C892 which covers the features of the M44C892 included the optional 512 bit EEPROM and both includes the performance of the M44C090.
IR keyless entry
Encoder M44Cx90/x92 U 426 B U 2535 B U 2538 B
Door locks Decoder & control Trunk Lights
TSHA5200 BPV23FN
RF keyless entry
"Super-het" Encoder M44Cx90/x92 Tx U2740B Rx S 822 T S 852 T 220-460 MHz IF strip U 4311 B M44Cx92 Alarm
Figure 1. Application example
TELEFUNKEN Semiconductors Rev. A1, 07-Oct-96
1(3)
Preliminary Information
M44Cx90/M44Cx92
V SS VDD OSC1 OSC2 Brown-out protect. RESET Voltage monitor external input VMI BP10 Port 1 BP13 BP20/TE Data direction Port 2 BP21 BP22 BP23 RC oscillator Crystal oscillator 32 kHz crystal osc. Timer / counter Timer 1 watchdog timer Timer 2 4 + 8 bit
Clock managment
ROM
2K x 8 bit 2K x 8 bit
RAM
128 x 4 bit
Modulator 2 Serial interface
T2O
SD SC
MARC4
4-bit CPU core I/O bus
Data direction + interrupt control Port 5 Modulator 3 demodulator Timer 3 - 8 bit timer/counter
T3O T3I
Data direction + alt. function Port 4
Data dir. + alt. function Port 6
xxxxxx
BP50 BP52 BP40 BP42 INT1 INT3 T2O BP43 INT6 BP53 BP51 SC BP41 INT3 VMI INT1 INT6 SD
BP60 T3I
BP63 T3O Additional blocks for M4xCx92
Figure 2. M44Cx90/x92
Table 1. Pin description
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2 (3)
Name VDD VSS BP10, BP13 BP20-TE BP21 - BP23 BP40-SC-INT3 BP41-VMI BP42-T2O BP43-SD-INT3 IP50-INT6 IP51-INT6 IP52-INT1 IP53-INT1 BP60-T3I BP63-T3O OSC1 OSC2
Function Power supply voltage Circuit ground 2 bidirectional I/O lines of Port 1 Bidirectional I/O line of Port 20, testmode enable (TE) 3 bidirectional I/O lines of Port 2 - bitwise configurable I/O Bidirectional I/O line of Port 40, serial clock I/O and interrupt 3 input Bidirectional I/O line of Port 41, voltage monitor input Bidirectional I/O line of Port 42, Timer 2 output Bidirectional I/O line of Port 43, serial data I/O and interrupt 3 input Input Port 50 line/interrupt 6 input Input Port 51 line/interrupt 6 input Input Port 52 line/interrupt 1 input Input Port 53 line/interrupt 1 input Bidirectional I/O line of Port 60, Timer 3 output Bidirectional I/O line of Port 63, Timer 3 input and phase control input Oscillator input for 32-kHz or 4 MHz crystal, extern. system clock input , trimming resistor pin Oscillator output for 32-kHz or 4 MHz crystal
Preliminary Information
TELEFUNKEN Semiconductors Rev. A1, 07-Oct-96
M44Cx90/M44Cx92
VDD 1 BP40/INT3/SC 2 BP53/INT1 3 BP52/INT1 4 BP51/INT6 5 BP50/INT6 6 OSC1 7 OSC2 BP60/T3I 8 9 20 VSS 19 BP43/INT3/SD 18 BP42/T2O 17 BP41/VMI VDD 1 BP40/INT3/SC 2 16 VSS 15 BP43/INT3/SD 14 BP42/T2O
BP53/INT1 3 BP52/INT1 4 BP51/INT6 5 BP50/INT6 6 OSC1 7 OSC2 8
M44Cx92
16 BP23 15 BP22 14 BP21 13 BP20/TE 12 BP63/T3O 11 BP13
M44Cx90
13 BP41/VMI 12 BP23 11 BP22 10 BP21 9 BP20/TE
BP10 10
Figure 3. Pin connections for M44Cx92 in SSO20 package (M48C892 only in SO20 package)
Figure 4. Pin connections for M44Cx90 in SO16 package
VDD 1 BP40/INT3/SC 2 BP50/INT6 3 OSC1 4
8 VSS
M44C090
7 6 5
BP43/INT3/SD BP42/T2O BP20/TE
Figure 5. Pin connections for M44C090 in SO8 package
We reserve the right to make changes to improve technical design without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use TEMIC products for any unintended or unauthorized application, the buyer shall indemnify TEMIC against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. TEMIC TELEFUNKEN microelectronic GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone: 49 ( 0 ) 7131 67 2831, Fax Number: 49 ( 0 ) 7131 67 2423 TELEFUNKEN Semiconductors Rev. A1, 07-Oct-96 3(3)
Preliminary Information

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