MSM64172 Datasheet, PDF (1/29 Pages) OKI electronic componets – 4-Bit Microcontroller with Built-in Serial Port and LCD Driver

E2E0032-38-95
¡ Semiconductor ^{¡ Semiconductor}
This version: _MSe_Sp_M. 1₆9₄9₁8₇₂
Previous version: Mar. 1996
MSM64172
4-Bit Microcontroller with Built-in Serial Port and LCD Driver
GENERAL DESCRIPTION
The MSM64172 is a low-power 4-bit microcontroller that incorporates Oki's original CPU core
nX-4/20. The MSM64172 has a minimum instruction execution time of 5 ms (@ 600 kHz and 3.0
V). The device includes an internal 2016-byte program memory, 128-nibble data memory, two
4-bit input-output ports, 4-bit input port, 8-bit synchronous serial port, LCD driver for up to 92
segments, and buzzer output port. Applications include low-power products with LCD
functions.
FEATURES
• Operating range
Operating frequencies
1.5 V spec.
: 32.768 kHz (crystal oscillation)
3.0 V spec. low-speed clock
: 32.768 kHz (crystal oscillation)
3.0 V spec. high-speed clock
: 600 kHz maximum
(RC oscillation/ceramic resonator oscillation)
Operating voltage
: 0.9 to 1.8 V (1.5 V spec.)
1.8 to 3.6 V (3.0 V spec.)
Operating temperature
: –10 to +65°C
• Memory space
Internal program memory
: 2016 bytes
Internal data memory
: 128 nibbles
• Minimum instruction execution time : 5 ms @ 600 kHz (3.0 V spec. only)
91.6 ms @ 32.768 kHz
• Serial port
: Clock synchro, 8-bit data transfer
• LCD driver
: 27 outputs (duty ratio switchable by software)
(1) At 1/4 duty and 1/3 bias
: 92 segments (max.)
(2) At 1/3 duty and 1/3 bias
: 72 segments (max.)
(3) At 1/2 duty and 1/2 bias
: 50 segments (max.)
• Buzzer driver
: 1 output; ON/OFF controllable in four modes
• Watchdog timer
• Clock
: 32.768 kHz crystal oscillator
RC oscillator/ceramic oscillator (600 kHz max.)
for high-speed clock (only for 3.0 V spec.)
CPU clock
: 32.768 kHz
Switchable to high-speed clock by software
(only for 3.0 V spec.)
Time base clock
: 32.768 kHz
• Power supply voltage
: 1.5 V/3.0 V (selectable by mask option), low
power consumption
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