ATAR862 datasheet(14/112 Pages) ATMEL

14 / 112 page

4589G–4BMCU–09/06

ATAR862-8

Figure 13-1. Block Diagram

14. Introduction

The ATAR862-8 is a member of Atmel’s family of 4-bit single-chip microcontrollers. It contains

ROM, RAM, parallel I/O ports, two 8-bit programmable multifunction timer/counters, voltage

supervisor, interval timer with watchdog function and a sophisticated on-chip clock generation

with integrated RC-, 32-kHz and 4-MHz crystal oscillators.

Table 14-1.

Available Variants

T2I

Voltage monitor

External input

MARC4

UTCM

OSC1

OSC2

I/O bus

ROM

RAM

4-bit CPU core

256 x 4 bit

V SS

Data direction +

alternate function

Data direction +

interrupt control

Port 4

Port 5

Data direction +

alternate function

Port 6

Timer 3

Brown-out protect.

RESET

Clock management

Timer 1

watchdog timer

Timer 2

Serial interface

Port 1

T2O

T3O

T3I

BP10

BP13

BP20/NTE

BP21

BP22

BP23

BP40

INT3

SC BP41

VMI

BP42

T2O

BP43

INT3

BP50

INT6

BP51

INT6

BP52

INT1

BP53

INT1

BP60

T3O

BP63

T3I

oscillators

Crystal

oscillators

4 K x 8 bit

VMI

with modulator

SSI

External

clock input

interval- and

8/12-bit timer

8-bit

timer / counter

with modulator

and demodulator

T2I

Version

Type

ROM

E2PROM Peripheral

Packages

Flash device

ATAM862

4-Kbyte EEPROM

64-bytes

SSO24

Production

ATAR862

4-Kbyte Mask ROM

64-bytes

SSO24

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