ATA6020N_05 Datasheet, PDF (1/69 Pages) ATMEL Corporation – Low-current Microcontroller for Watchdog Function

Features/Benefits
• Programmable System Clock with Prescaler and Three Different Clock Sources
• Very Low Sleep Current (< 1 µA)
• Very Low Power Consumption in Active, Power-down and Sleep Mode
• 2-Kbyte ROM, 256 × 4-bit RAM
• 12 Bi-directional I/Os
• Up to 6 External/Internal Interrupt Sources
• Synchronous Serial Interface (2-wire, 3-wire)
• Multifunction Timer/Counter with
– Watchdog, POR and Brown-out Function
– Voltage Monitoring Inclusive Lo_BAT Detection
– Flash Controller ATAM893 Available (SSO20)
– Code-efficient Instruction Set
– High-level Language Programming with qFORTH Compiler
1. Description
The ATA6020N is a member of Atmel’s 4-bit single-chip microcontroller family. It con-
tains ROM, RAM, parallel I/O ports, one 8-bit programmable multifunction
timer/counter with modulator function, voltage supervisor, interval timer with watchdog
function and a sophisticated on-chip clock generation with external clock input and
integrated RC-oscillators.
Figure 1-1. Block Diagram
V_SS V_DD
OSC1
Low-current
Microcontroller
for Watchdog
Function
ATA6020N
BP20/NTE
BP21
BP22
BP23
Brown-out protect
RESET
Voltage monitor
External input
VMI
RC
oscillators
External
clock input
Clock management
ROM
2 K x 8 bit
RAM
256 x 4 bit
MARC4
4-bit CPU core
I/O bus
Data direction +
alternate function
Port 4
Data direction +
interrupt control
Port 5
UTCM
Timer 1
interval- and
watchdog timer
Timer 2
T2I
8/12-bit timer T2O
with modulator
SD
SSI
SC
Serial interface
BP40 BP42
INT3
T2O
SC
BP41 BP43
VMI
INT3
T2I
SD
BP50 BP52
INT6 INT1
BP51 BP53
INT6 INT1
Rev. 4708D–4BMCU–09/05