
M44C510E
Preliminary Information
Rev. A1, 04-May-00
1 (60)
MARC4 – 4-bit Universal Microcontroller
The M44C510E is a member of the TEMIC Semiconductors 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 multifunction timer/counter module and a versatile software configurable
on-chip system clock module.
Features / Benefits
D 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
D Wide supply voltage range (2.2 V to 6.2 V)
D Very low halt current (< 1 mA)
D 4 KByte ROM, 256 x 4-bit RAM
D 8 hard– and software interrupt priority levels
D Up to 10 external and 4 internal interrupts, bitwise
maskable with programmable priority level
D Up to 34 I/O lines including 8 high drive I/O-lines
(20 mA, VDD = 5 V)
D I/O ports – bitwise configurable with combined inter-
rupt handling (for serial I/O applications)
D 2 x 8-bit multifunction timer/counters
D Coded reset and watchdog timer **
D Power-on reset and “brown out” function
D Various power-down modes
D Efficient, hardware-controlled interrupt handling
D High-level programming language in qFORTH
D Comprehensive library of useful routines
D Windows 95/ NT based development tools
(** mask option)
MARC4
System
clock
Timer/
counter
Timer 0
Timer 1
Master
reset
TE
Port 0 Port 1 Port 5
Port B
SCLIN
I/O bus
ROM
RAM
4–bit CPU core
4K x 8 bit
256 x 4 bit
Watch–
dog
I/O
Test
Sleep
NRST
VDD
VSS
Port 7
Port A
I/O
Port 4
I/O
Interrupt
& reset
Prescaler
AVDD
I/O
Interrupt
I/O
Interrupt
Port 6
Real time
clock
OSCIN OSCOUT
Melody
& buzzer
TIM1
13374
I/O
Port C
44
4
44
4
2
Figure 1. Block diagram