E2E0035-38-94
¡ Semiconductor
MSM64164C
¡ Semiconductor
This version: Sep. 1998
MSM64164C
Previous version: Apr. 1998
4-Bit Microcontroller with Built-in RC Oscillation Type A/D Converter and LCD Driver
GENERAL DESCRIPTION
The MSM64164C is a low power 4-bit microcontroller that employs Oki's original CPU core nX-
4/20.
The MSM64164C is best suitable for applications such as low power, high precision thermome-
ters and hygrometers.
The MSM64P164 is a one-time-programmable ROM-version product having one-time PROM
(OTP) as internal program memory.
The MSM64P164 is used to evaluate the software development.
The MSM64P164 differs from the MSM64164C in the polarity of the power supply.
FEATURES
• Operating range
Operating frequencies
Operating voltage
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32.768 kHz, 400 kHz
1.25 to 1.7 V (1.5 V spec.)
2.0 to 3.5 V (3 V spec.)
2.2 to 3.5 V (3 V spec., 1/2 duty)
–40 to +85°C
4064 bytes
256 nibbles
7.5
ms
@ 400 kHz
91.6
ms
@ 32.768 kHz
2 channels
Time dividing 2-channel method
Synchronous 8-bit transfer
34 outputs; duty ratio switchable by software
120 segments (max)
93 segments (max)
64 segments (max)
1 output (4 output modes selectable)
2 channels
32.768 kHz crystal oscillator and 400 kHz RC
oscillator (with an external resistor)
32.768 kHz/400 kHz (switchable by software)
32.768 kHz
1.5 V/3 V (selectable by mask option)
3 ports
¥
4 bits
1 port
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4 bits
1 port
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4 bits
(8 out of the 34 LCD driver outputs can be used
as output-only ports by mask option.)
1/41
Operating temperature
• Memory space
Internal program memory
Internal data memory
• Minimum instruction execution time
• RC oscillation type A/D converter
• Serial port
• LCD driver
(1) At 1/4 duty and 1/3 bias
(2) At 1/3 duty and 1/3 bias
(3) At 1/2 duty and 1/2 bias
• Buzzer driver
• Capture circuit
• Watchdog timer
• Clock
CPU clock
Time base clock
• Power supply voltage
• I/O port
Input-output port
Input port
Output port
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OKI [ OKI ELECTRONIC COMPONETS ]
