ATAR892 Datasheet, PDF (1/100 Pages) ATMEL Corporation – Low-current Microcontroller for Wireless Communication

Features
• 4-Kbyte ROM, 256 × 4-bit RAM
• 16 Bidirectional I/Os
• Up to 7 External/Internal Interrupt Sources
• Multifunction Timer/Counter with
– IR Remote Control Carrier Generator
– Bi-phase-, Manchester- and Pulse-width Modulator and Demodulator
– Phase Control Function
• 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 (ATAR892 only)
• Synchronous Serial Interface (2-wire, 3-wire)
• Watchdog, POR and Brown-out Function
• Voltage Monitoring Inclusive Lo_BAT Detect
• Flash Controller ATAM893 Available (SSO20)
Description
The ATAR092 and ATAR892 are members of Atmel’s family of 4-bit single-chip micro-
controllers. They offer highest integration for IR and RF data communication, remote-
control and phase-control applications. The ATAR092 and ATAR892 are suitable for
the transmitter side as well as the receiver side. They contain ROM, RAM, parallel I/O
ports, 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 external clock input, integrated RC-,
32-kHz crystal- and 4-MHz crystal-oscillators. The ATAR892 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
ATAR092
ATAR892
BP10
BP13
BP20/NTE
BP21
BP22
BP23
Brown-out protect.
RESET
Voltage monitor
External input
VMI
Port 1
RC
Crystal
External
oscillators oscillators clock input
Clock management
ROM
4 K x 8 bit
RAM
256 x 4 bit
MARC4
4-bit CPU core
I/O bus
UTCM
Timer 1
interval- and
watchdog timer
Timer 2
T2I
8/12-bit timer T2O
with modulator
SD
SSI
SC
Serial interface
Timer 3
T3O
8-bit
timer/counter T3I
with modulator
and demodulator
Data direction +
alternate function
Port 4
Data direction +
interrupt control
Port 5
Data direction +
alternate function
Port 6
BP40 BP42
INT3 T2O
SC
BP41 BP43
VMI
INT3
T2I
SD
BP50
INT6
BP52
INT1
BP51
INT6
BP53
INT1
BP60
T3O
BP63
T3I
Rev. 4535C–4BMCU–02/04