ATAM894 Datasheet | Atmel

Features - - - - - - - - - - - - - - 8 K × 8-bit EEPROM EEPROM Programmable Options Read Protection for the EEPROM Program Memory 256 × 4-bit RAM 2 × 32 × 16-bit Data EEPROM Up to Seven External/Internal Interrupt Sources Eight Hardware and Software Interrupt Priorities 16 Bi-directional I/Os Wide Supply-voltage Range (1.8V to 6.5V) Very Low Sleep Current (< 1 µA) Synchronous Serial Interface (2-wire, 3-wire) Multifunction Timer/Counter with Prescaler/Interval Timer Voltage Monitoring Inclusive Lo_BAT Detect Watchdog, POR and Brown-out Function 8k-flash Microcontroller ATAM894 1. Description The ATAM894 is a member of the Atmel’s family of 4-bit single chip microcontrollers with 8K × 8-bit EEPROM program memory. It is based on the 4-K MTP version ATAM893 and fully patible with this MTP and the ROM versions ATAR090/890 and ATAR092/892. Figure 1-1. Block Diagram VSS VDD OSC1 OSC2 .. Brown-out protect. RESET Voltage monitor External input VMI BP10 Port 1 BP13 Data direction RC Crystal oscillators oscillators External clock input UTCM Timer 1 interval- and watchdog timer Timer 2 with prescaler T2I T2O SD Clock management EEPROM 8 K x 8 bit 256 x 4 bit Modulator 2 SSI SC T3O T3I BP20/NTE Port 2 MARC4 4-bit CPU core I/O bus Serial interface Modulator 3 Demodulator Timer 3 timer/counter BP21 BP22 BP23 Data direction + alternate function Port 4 Data direction + interrupt control Port 5 Data dir. + alt. function Port 6 EEPROM 2 x 32 x 16 bit SD SC BP40 BP42 BP52 BP50 T2O INT3 INT6 INT1 SC BP43 BP51 BP53 BP41 VMI INT3 INT6 INT1 T2I...