M34580M2-055FP

DESCRIPTION

The 4551 Group is a 4-bit single-chip microcomputer designed with CMOS technology. Its CPU is that of the 4500 series using a simple, high-speed instruction set. The computer is equipped with an 8-bit timer with a reload register, a 14-bit timer which is also used as a watchdog timer, a 4-bit timer with a reload register, a carrier wave output circuit and an LCD control circuit. The mask ROM version and built-in PROM version of 4551 Group are produced as shown in the table below.

FEATURES

● Minimum instruction execution time ............................. 3.0 µs
(f(XIN)=4.0 MHz, VDD=3.0 V, system clock = f(XIN)/4)
● Supply voltage
............................. 2.5 V to 5.5 V (One Time PROM version)
....................................... 2.2 V to 5.5 V (Mask ROM version)
● System clock switch function
........................................... Clock divided by 4 or not divided
● LCD control circuit
Segment output...................................................................20
Common output .................................................................... 4
● Carrier wave frequency switch function
System clock, system clock/2, system clock/8,
system clock/12, system clock/16, system clock/24, “H” fixed
● Timers
Timer 1 ................................ 8-bit timer with a reload register
Timer 2 ............... 14-bit timer also used as a watchdog timer
Timer LC ............................. 4-bit timer with a reload register
● Interrupt ................................................................... 3 sources
● Voltage drop detection circuit ............................................... 1
● Clock generating circuit (ceramic resonance and quartz-crystal oscillation)

APPLICATION

Remote control transmitter