Rainbow Electronics ATAR862-3 - Manual (Page 13)

13
ATAR862-3
4556B–4BMCU–02/03
Microcontroller Block
Features
• Extended Temperature Range for High Temperature up to 125
°C
• 4-Kbyte ROM, 256 x 4-bit RAM
• 16 Bi-directional I/Os
• Up to Seven External/Internal Interrupt Sources
• Multifunction Timer/Counter
– IR Remote Control Carrier Generator
– Biphase-, Manchester- and Pulse-width Modulator and Demodulator
– Phase Control Function
• Programmable System Clock with Prescaler and Five Different Clock Sources
• Supply-voltage Range (2.0 V to 4.0 V)
• Very Low Sleep Current (< 1 µA)
• 32 x 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 T48C862 Available (SSO24)
Description
The ATAR862-3 is a member of Atmel’s family of 4-bit single-chip microcontrollers. It
offers highest integration for IR and RF data communication, remote-control and phase-
control applications. The ATAR862-3 is suitable for the transmitter side as well as the
receiver side. It contains 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-oscillator, 32-kHz and 4-MHz crystal-oscillators. The
ATAR862-3 has an EEPROM as a third chip in one package.
Figure 9. Block Diagram of Microcontroller
V
T2I SD
Voltage monitor
External input
MARC4
UTCM
OSC1 OSC2
I/O bus
ROM RAM
4-bit CPU core
256 x 4 bit
DD 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
P
o
rt
2
D
a
ta
d
ir
e
c
ti
o
n
T2O
SD
SC
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
RC
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