FEDL64167E-02
¡ Semiconductor
FEDL64167E-02
This version: Dec. 1999
MSM64167E
Previous version: Jul. 1999
¡ Semiconductor
MSM64167E
GENERAL DESCRIPTION
4-Bit Microcontroller with Built-in Dual-Slope Type A/D Converter and LCD Driver
The MSM64167E is a low power 4-bit microcontroller that employs Oki's original CPU core nX-
4/20.
The MSM64167E contains a dual-slope type A/D converter with a 4-channel input, LCD driver
for up to 108 segments, and buzzer output port.
The MSM64167E is best suited for applications such as low power, high precision thermometers,
barometers, and hygrometers.
FEATURES
• Operating range
Operating frequencies
Operating voltage
Operating temperature
• Memory space
Internal program memory
Internal data memory
• Minimum instruction execution time
• Dual-slope type A/D converter
• 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
• Timer
Auto-reload mode
Capture mode
Clock frequency measuring mode
• Watchdog timer
• Clock
CPU clock
Time base clock
• Power supply voltage
• I/O port
Input-output port
Output port
:
:
:
:
:
:
:
:
:
:
:
:
:
32.768 kHz, 700 kHz
2.6 to 3.6 V
–40 to +85°C
4064 bytes
256 nibbles
4.3
ms
@ 700 kHz
91.6
ms
@ 32.768 kHz
4-channel input
31 outputs; duty ratio switchable by software
108 segments (max)
84 segments (max)
58 segments (max)
1 output (4 output modes selectable)
16-bit
¥
1
:
:
:
:
:
:
32.768 kHz crystal oscillator and 700 kHz RC
oscillator (with an external resistor)
32.768 kHz/700 kHz (switchable by software)
32.768 kHz
3V
3 ports
¥
4 bits
2 ports
¥
4 bits
(8 out of the 31 LCD driver outputs can be used
as output-only ports by mask option.)
Synchronous/asynchronous mode support
32.768 kHz/external clock
9600 bps/4800 bps/2400 bps/1200 bps
• Serial port
Synchronous mode
Asynchronous mode
:
:
:
1/31