ATAR080

www.DataSheet4U.com Features/Benefits Very Low Power Consumption in Active, Power-down and Sleep Mode 2-Kbyte ROM, 256 × 4-bit RAM 12 Bi-directional I/Os Up to 6 External/Internal Interrupt Sources Multifunction Timer/Counter 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) 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 ATAR080 is a member of Atmel’s family of 4-bit single-chip microcontrollers. It contains ROM, RAM, parallel I/O ports, one 8-bit programmable multifunction timer/counter with modulator function, voltage supervision, interval timer with watchdog function and a sophisticated on-chip clock generation with external clock input, integrated RC-, 32-kHz and 4-MHz crystal-oscillators. Figure 1. Block Diagram VSS VDD NRST/ OSC1 OSC2 Low-current Microcontroller for Wireless Communication ATAR080 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 Timer 2 8/12-bit timer with modulator SSI Serial interface ROM RAM 2 K × 8 bit 256 × 4 bit T2I T2O SD SC BP20/NTE BP21 BP22 BP23 Port 2 Data direction MARC4 4-bit CPU core I/O bus Data direction + alternate function Port 4 Data directi...