MSM64155A/64155AL

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GENERAL DESCRIPTION

The MSM64155A (1.5 V)/64155AL (3.0 V) is a high-performance 4-bit microcontroller that

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

The MSM64155A/64155AL has an LCD driver for up to 240 segments, an event counter, and

melody circuits. 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 mA (3.0 V at HALT mode)

• Minimum instruction execution time : 91 ms

• General memory space

: 4064 bytes

• Local memory space

: 256 nibbles

• LCD driver

: 64

Common driver ¥ 4

Segment driver ¥ 60

1/4 duty, 1/3 bias; 240 segments (60 ¥ 4)

1/3 duty, 1/3 bias; 180 segments (60 ¥ 3)

• I/O port

Input-output port

: 2 ports ¥ 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)

Output port

: 1 port ¥ 4 bits (CMOS output)

• Event counter

: 1 channel

• Melody output

: 2

• Interrupts

: 10 sources

External 4, time base 4, melody 2

• Package:

100-pin plastic QFP (QFP100-P-1420-0.65-BK) : (Product name : MSM64155A-¥¥¥GS-BK,

MSM64155AL-¥¥¥GS-BK)

Chip

: MSM64155A-¥¥¥, MSM64155AL-¥¥¥

¥¥¥ indicates a code number.

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

(The power polarity and operating voltage of the MSM64P155/64P155L are different from the

MSM64155A/64155AL. For details, refer to the "MSM64P155 User's Manual".)

¡ Semiconductor

MSM64155A/64155AL

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

E2E0030-38-95

This version: Sep. 1998

Previous version: Mar. 1996