ATAR090 Datasheet | Atmel

Features - - - - - - - - - - - - 2-Kbyte ROM, 256 × 4-bit RAM 12 Bi-directional I/Os Up to 6 External/Internal Interrupt Sources Multifunction Timer/Counter with - IR Remote Control Carrier Generator - Bi-phase-, Manchester- and Pulse-width Modulator and Demodulator Programmable System Clock with Prescaler and Five Different Clock Sources Wide Supply-voltage Range (1.8 V to 6.5 V) Very Low Sleep Current (< 1 µA) 32 × 16-bit EEPROM (ATAR890 only) Synchronous Serial Interface (2-wire, 3-wire) Watchdog, POR and Brown-out Function Voltage Monitoring Inclusive Lo_BAT Detection Flash Controller ATAM893 Available (SSO20) Description The ATAR090 and ATAR890 are members of Atmel’s family of 4-bit single-chip microcontrollers. They offer the highest integration for IR and RF data munication and remote-control. The ATAR090 and ATAR890 are suitable for the transmitter side. They contain ROM, RAM, parallel I/O por ts, two 8-bit programmable multifunction timer/counters with modulator and demodulator function, voltage supervisor, interval timer with watchdog function and a sophisticated on-chip clock generation with external clock input, integrated RC-, 32-k Hz crystal- and 4-MHz crystal-oscillators. The ATAR890 has an additional EEPROM as a second chip in one package. Figure 1. Block Diagram VSS VDD OSC1 OSC2 .. Low-current Microcontroller for Wireless munication ATAR090 ATAR890 Brown-out protect RESET Voltage monitor External input VMI Crystal External 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 Timer 2 8/12-bit timer with modulator SSI Serial interface T2I T2O SD SC Data direction BP20/NTE Port 2 BP21 BP22 BP23 MARC4 4-bit CPU core I/O bus Data direction + alternate function Port 4 Data direction + interrupt control Port 5 BP40 BP42 INT3 T2O SC BP41 BP43 INT3 VMI SD T2I BP50 BP52 INT6 INT1 BP53 BP51 INT1 INT6 Rev. 4696C- 4BMCU- 02/04 Pin Configuration Figure 2. Pinning SSO20 VDD...