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ATAR890_14

Description
Multifunction Timer/Counter with
File Size762KB,75 Pages
ManufacturerAtmel (Microchip)
Download Datasheet Compare View All

ATAR890_14 Overview

Multifunction Timer/Counter with

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 micro-
controllers. They offer the highest integration for IR and RF data communication 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 exter-
nal clock input, integrated RC-, 32-kHz crystal- and 4-MHz crystal-oscillators. The
ATAR890 has an additional EEPROM as a second chip in one package.
Figure 1.
Block Diagram
V
SS
V
DD
OSC1 OSC2
Low-current
Microcontroller
for Wireless
Communication
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
BP42
BP40
T2O
INT3
SC BP41
BP43
INT3
VMI
SD
T2I
BP52
BP50
INT6
INT1
BP53
BP51
INT1
INT6
Rev. 4696D–4BMCU–12/04

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