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ATAM894 Datasheet(PDF) 1 Page - ATMEL Corporation |
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ATAM894 Datasheet(HTML) 1 Page - ATMEL Corporation |
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1 / 97 page  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 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 compatible with this MTP and the ROM versions ATAR090/890 and ATAR092/892. Figure 1-1. Block Diagram Voltage monitor External input MARC4 UTCM OSC1 OSC2 I/O bus EEPROM 8 K x 8 bit RAM 4-bit CPU core 256 x 4 bit V DD Data direction + alternate function Data direction + interrupt control Port 4 Port 5 Data dir. + alt. function Port 6 Timer 3 Brown-out protect. RESET Clock management Timer 1 watchdog timer Timer 2 Serial interface Port 1 T2O SD SC T3O T3I BP10 BP13 BP20/NTE BP21 BP22 BP23 BP40 INT3 SC BP41 VMI T2I BP42 T2O BP43 INT3 SD BP50 INT6 BP51 INT6 BP52 INT1 BP53 INT1 BP60 T3O BP63 T3I RC oscillators Crystal oscillators VMI with prescaler SSI External clock input interval- and timer/counter T2I EEPROM 2 x 32 x 16 bit Modulator 2 Modulator 3 Demodulator SD SC V SS 8k-flash Microcontroller ATAM894 Rev. 4679D–4BMCU–05/05 |
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