MARC4 4-bit
Universal
Microcontroller
ATAR510
Rev. 4703B–4BMCU–01/05
Features
• Programmable System Clock with Prescaler and Five Different Clock Sources
– 4-MHz Crystal Oscillator
– 32-kHz Crystal Oscillator
– RC-oscillator Fully Integrated
– RC-oscillator with External Resistor Adjustment
– External Clock Input
Wide Supply-voltage Range (2.2 V to 6.2 V)
Very Low Halt Current (< 1 µA)
4-Kbyte ROM, 256 × 4-bit RAM
8 Hard and Software Interrupt Priority Levels
Up to 10 External and 4 Internal Interrupts, Bit Wise Maskable with
Programmable Priority Level
Up to 34 I/O Lines Including 8 High Drive I/O-lines (20 mA, V
DD
= 5 V)
I/O Ports – Bit Wise Configurable with Combined Interrupt Handling
(for Serial I/O Applications)
2 × 8-bit Multifunction Timer/Counters
Coded Reset and Watchdog Timer (Mask Option)
Power-on Reset and “Brown Out” Function
Various Power-down Modes
Efficient, Hardware-controlled Interrupt Handling
High Level Programming Language qFORTH
Comprehensive Library of Useful Routines
Windows
®
95/Windows NT
®
Based Development Tools
Description
The ATAR510 is a member of Atmel’s family of 4-bit single-chip microcontrollers. It
contains ROM, RAM, up to 34 digital I/O pins, up to 10 maskable external interrupt
sources, 4 maskable internal interrupts, a watchdog timer, interval timer, 2 x 8-bit mul-
tifunction timer/counter module, and a versatile software configurable on-chip system
clock module.