M34556M4H

Features:

Minimum instruction execution time .................................. 0.5 s (at 6 MHz oscillation frequency, in through-mode)
Supply voltage
    Mask ROM version ...................................................... 1.8 to 5.5 V
    One Time PROM version ............................................. 2.5 to 5.5 V (It depends on operation source clock, oscillation frequency and operation mode)
Timers
    Timer 1 ...................................... 8-bit timer with a reload register
    Timer 2 ................................. 8-bit timer with two reload registers
    Timer 3 .............................. 16-bit timer (fixed dividing frequency)
Interrupt ........................................................................ 4 sources
Key-on wakeup function pins ..................................................... 9
LCD control circuit
    Segment output ........................................................................ 23
    Common output .......................................................................... 4
Voltage drop detection circuit (only H version)
    Reset occurrence .................................... Typ. 1.8 V (Ta = 25 °C)
    Reset release .......................................... Typ. 1.9 V (Ta = 25 °C)
Watchdog timer
Clock generating circuit
    Built-in clock (built-in ring oscillator)
    Main clock (ceramic resonator/RC oscillation)
    Sub-clock (quartz-crystal oscillation)
LED drive directly enabled (port D)


Application

Remote control transmitter


Pinout




Specifications

Symbol	Parameter	Conditions	Ratings	Unit
VDD	Supply voltage		0.3 to 6.5	V
VI	Input voltage P0, P1, P2, D0D5, RESET, INT, XIN, XCIN		0.3 to VDD+0.3	V
VI	Input voltage CNTR		0.3 to VDD+0.3	V
VO	Output voltage P0, P1, P2, D0D7, RESET, CNTR	Output transistors in cut-off state	0.3 to VDD+0.3	V
VO	Output voltage C, XOUT, XCOUT		0.3 to VDD+0.3	V
VO	Output voltage SEG0SEG28, COM0COM3		0.3 to VDD+0.3	V
Pd	Power dissipation	Ta = 25 °C	300	mW
Topr	Operating temperature range		20 to 85	°C
Tstg	Storage temperature range		40 to 125	°C

Note: SEG₁₁ to SEG₁₆ pins are not equipped with the 4556 Group.


Description

The 4556 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 of 4556 is equipped with two 8-bit timers (each timer has one or two reload register), a 16-bit timer for clock count, interrupts, and oscillation circuit switch function. The various microcomputers in the 4556 Group include variations of the built-in memory size as shown in the table below.