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M44C890

Atmel
Part Number M44C890
Manufacturer Atmel
Description (M44C890 / M44C090) Low Current Microcontroller
Published Oct 25, 2005
Detailed Description M44C090 M44C890 Low-Current Microcontroller for Wireless Communication The M44C090 and M44C890 are members of Atmels fam...
Datasheet PDF File M44C890 PDF File

M44C890
M44C890


Overview
M44C090 M44C890 Low-Current Microcontroller for Wireless Communication The M44C090 and M44C890 are members of Atmels family of 4-bit single-chip microcontrollers.
They offer highest integration for IR and RF data communication and remote-control applications.
The M44C090 / M44C890 is suitable for the transmitter side.
It contains ROM, RAM, parallel I/O ports, one 8-bit programmable multifunction timer/ counter with modulator function, voltage supervisor, interval timer with watchdog function and a sophisticated on-chip clock generation with external clock input, integrated RC-, 32-kHz crystal- and 4-MHz crystal-oscillators.
The M44C890 has an additional EEPROM as a second chip in one package.
Features / Benefits D 2-Kbyte ROM, 256 x 4-bit RAM D 12 bidirectional I/Os D Up to 6 external / internal interrupt sources D Multifunction timer/counter with – IR remote control carrier generator – Biphase-, Manchester- and pulse-width modulator D Programmable system-clock with prescaler and five different clock sources V SS VDD D Wide supply voltage range (1.
8 to 6.
5 V) D Very low sleep current (< 1 µA) D 32 x 16-bit EEPROM (M44C890 only) D Synchronous serial interface (2-wire, I2C, 3-wire) D Watchdog, POR and brown-out function D Voltage monitoring incl.
Lo_BAT detect D Flash controller T48C893 available (SSO20) OSC1 OSC2 Brown-out protect.
RESET Voltage monitor External input VMI External Crystal RC oscillators oscillators clock input Clock management UTCM Timer 1 interval- and watchdog timer ROM 2 K x 8 bit RAM 256 x 4 bit BP20/NTE Data direction Port 2 BP21 BP22 BP23 MARC4 4-bit CPU core I/O bus Data direction + interrupt control Port 5 Timer 2 8/12-bit timer with modulator SSI Serial interface T2I T2O SD SC Data direction + alternate function Port 4 BP40 BP42 INT3 T2O BP43 SC BP41 INT3 VMI SD T2I BP50 BP52 INT6 INT1 BP53 BP51 INT1 INT6 13389 Figure 1.
Block diagram M44C090/M44C890 Rev.
A4, 14-Dec-01 1 (63) M44C090 M44C890 VDD BP40/INT3/SC BP53/INT1 BP52/...


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