MSM64162A

E2E0049-18-95 ¡ Semiconductor MSM64162A ¡ Semiconductor This version: Sep. 1998 MSM64162A 4-Bit Microcontroller with Built-in RC Oscillation Type A/D Converter and LCD Driver GENERAL DESCRIPTION The MSM64162A is a low power 4-bit microcontroller that employs Oki's original CPU core nX4/20. The MSM64162A has 2-channel RC oscillation type A/D converter, LCD driver for up to 80 segments, and buzzer output port. It is best suited for applications such as low power, high precision thermometers and hygrometers. FEATURES Operating range Operating frequencies Operating voltage : : 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 Operating temperature Memory space Internal program memory Internal data memory Minimum instruction execution time : : : : 2016 bytes 128 nibbles 7.5 ms @ 400 kHz 91.6 ms @ 32.768 kHz RC oscillation type A/D converter : 2 channels Time division 2-channel method LCD driver : 24 outputs (1) At 1/4 duty and 1/3 bias : 80 segments (max) (2) At 1/3 duty and 1/3 bias : 63 segments (max) (3) At 1/2 duty and 1/2 bias : 44 segments (max) Voltage Regulator for LCD Driver (selectable by mask option) The LCD panel display is stable regardless of temporary supply voltage drop, because the voltage generated by the voltage regulator for LCD driver is supplied to the bias voltage generator as a reference voltage. LCD Operating Voltage When the voltage regulator for LCD driver is used : ...