MSM64172

E2E0032-38-95 ¡ Semiconductor ¡ Semiconductor MSM64172 This version: MSM64172 Sep. 1998 Previous version: Mar. 1996 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. 3.0 V spec. low-speed clock 3.0 V spec. high-speed clock Operating voltage Operating temperature Memory space Internal program memory Internal data memory Minimum instruction execution time 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 Watchdog timer Clock : : : : : : : : : : : : : : : 32.768 kHz (crystal oscillation) 32.768 kHz (crystal oscillation) 600 kHz maximum (RC oscillation/ceramic resonator oscillation) 0.9 to 1.8 V (1.5 V spec.) 1.8 to 3.6 V (3.0 V spec.) –10 to +65°C 2016 bytes 128 nibbles 5 ms @ 600 kHz (3.0 V spec. only) 91.6 ms @ 32.768 kHz Clock synchro, 8-bit data transfer 27 outputs (duty ratio switchable by software) 92 segments (max.) 72 segments (m...