ML64P168

FEDL64P168-01 Semiconductor ML64P168 GENERAL DESCRIPTION This version: Sep. 27,1999 Previous version: Jun. 22,1999 4-Bit Microcontroller with Built-in RC Oscillation Type A/D Converter and LCD Driver The ML64P168 is a one-time-programmable ROM-version product, which has one-time PROM (OTP) as internal program memory. On the other hand, the ML64168 is a mask ROM-version product, which has mask ROM as internal program memory. Unlike the mask ROM-version product (ML64168), the ML64P168 cannot be supplied in the form of a chip. The ML64P168 has two operation modes, microcontroller operation mode and PROM mode. The microcontroller operation mode is used to operate the ML64P168 like a ML64168 and the PROM mode is used to program or read the PROM. The ML64P168 is a low power 4-bit microcontroller incorporating the Oki’s original CPU core nX4/30. The ML64P168 provides a minimum instruction execution time of 4.3µs (@700kHz). The ML64P168 contains 8160-byte program memory, 512-nibble data memory, three 4-bit input-output ports, 4-bit input port, 4-bit output port, 2-channel RC oscillation type A/D converter, LCD driver for up to 120 segments, and buzzer output port. APPLICATION The ML64P168 is best suited for low power, high precision thermometers and hygrometers. FEATURES ∙ Processing speed Minimum instruction execution time : 4.3 µs @700 kHz 91.6 µs @32.768 kHz ∙ Clock generation circuit Low-speed clock : 32.768 kHz crystal oscillator High-speed clock : 700 kHz RC oscillator (...