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¡ Semiconductor

MSM64158A/64158AL

GENERAL DESCRIPTION

The MSM64158A (1.5 V)/64158AL (3.0 V) is a high-performance 4-bit microcontroller that

incroporates Oki-original CPU core nX-4/20.

The MSM64158A/64158AL has an LCD driver for up to 144 segments, an event counter, and a

melody circuit. It is best suited for applications such as clocks and LCD games.

FEATURES

• Operating range

Operating voltage

: 1.5 V/3.0 V

Operating temperature

: –40 to +70

°C

Operating frequency

: 32.768 kHz crystal oscillation

Approx. 32 kHz RC oscillation

Supply current (Typ.)

: 0.9

µA (3.0 V at HALT mode)

• Minimum instruction execution time

: 91

µs

• General memory space

: 2528 bytes

• Local memory space

: 128 nibbles

• LCD drivers

: 40

Common driver ¥ 4

Segment driver ¥ 36

1/4 duty, 1/3 bias; 144 segments (36 ¥ 4)

1/3 duty, 1/3 bias; 108 segments (36 ¥ 3)

• I/O port

Input-output port

: 1 port ¥ 4 bits (open drain output/CMOS output

selectable; pull-down resistor input/high-

impedance input selectable)

Input port

: 1 port ¥ 2 bits (pull-down resistor input /high-

impedance input selectable)

1 port ¥ 4 bits (pull-down resistor input/high-

impedance input selectable)

• Event counter

: 1

• Melody output

: 1

• Interrupts

: 7 sources (external 3, time base 3, melody 1)

• Package:

64-pin plastic QFP (QFP64-P-1414-0.80-BK): (Product name : MSM64158A-¥¥¥GS-BK,

MSM64158AL-¥¥¥GS-BK)

Chip

: MSM64158A-¥¥¥, MSM64158AL-¥¥¥

¥¥¥ indicates a code number.

• OTP version (for program evaluation) : MSM64P155/64P155L

(The packages, power polarity, and operating voltage of the MSM64P155/64P155L are

different from the MSM64158A/64158AL. For details, refer to the "MSM64P155 User's

Manual".)

¡ Semiconductor

MSM64158A/64158AL

4-Bit Microcontroller with Built-in LCD Driver and Melody Circuit

E2E0031-38-95

This version: Sep. 1998

Previous version: Mar. 1996