Features
• Extended Temperature Range for High Temperature up to 125°C
• 4-Kbyte ROM, 256 × 4-bit RAM
• 16 Bi-directional 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)
• Synchronous Serial Interface (2-wire, 3-wire)
• Watchdog, POR and Brown-out Function
• Voltage Monitoring Inclusive Lo_BAT Detect
• Flash Controller ATAM893 Available (SSO20)
Low-current
Microcontroller
for Wireless
Communication
Description
The ATAR092-D is a member of Atmel’s family of 4-bit single-chip microcontrollers. It
offers the highest integration for IR and RF data communication, remote-control and
phase-control applications. The ATAR092-D is suitable as a transmitter as well as a
receiver. They contain ROM, RAM, parallel I/O ports, two 8-bit programmable multi-
function 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.
ATAR092-D
Figure 1. Block Diagram
VSS
VDD
OSC1 OSC2
Crystal
Brown-out protect.
RESET
UTCM
RC
External
oscillators oscillators clock input
Timer 1
Voltage monitor
External input
Clock management
interval- and
watchdog timer
T2I
Timer 2
VMI
8/12-bit timer
with modulator
T2O
BP10
BP13
ROM
4 K x 8 bit
RAM
256 x 4 bit
Port 1
SD
SC
SSI
Serial interface
Timer 3
MARC4
BP20/NTE
T3O
T3I
4-bit CPU core
BP21
BP22
8-bit
timer/counter
with modulator
and demodulator
I/O bus
BP23
Data direction +
alternate function
Data direction +
interrupt control
Data direction +
alternate function
Port 4
Port 5
Port 6
BP63
BP60
T3O
BP40
BP42
T2O
BP50
INT6
BP52
INT1
T3I
INT3
SC
BP41
BP43
INT3
SD
BP53
INT1
BP51
INT6
VMI
T2I
Rev. 4594C–4BMCU–12/04