MSM6577-xx

E2E0022-27-Y3 ¡ Semiconductor ¡ Semiconductor MSM6577-xx GENERAL DESCRIPTION This version: Jan. 1998 MSM6577-xx Previous version: Mar. 1996 Operatable at 0.9V and Built-in LCD Driver 4-Bit Microcontroller The MSM6577 is a 4-bit microcontroller that is fabricated in OKI's low-voltage CMOS technology, enabling operation at 0.9 V. This device incorporates LCD drivers, 8-bit synchronous serial ports, and a buzzer output circuit. The MSM6577 is optimized for remote-control microcontroller applications that are portable and battery powered. www.DataSheet4U.com FEATURES Operating range Operating frequency Operating voltage : 32.768 kHz : MSM6577K/N/S/U : MSM6577L/C/D/E (See Mask Option List.) : –20 to +70°C : 1536 words ¥ 17 bits : 128 words ¥ 4 bits : 61 ms 1.5 V operation 3.0 V operation ROM RAM Minimum instruction execution time I/O port Input-output port : 1 port ¥ 4 bits Input only port : 1 port ¥ 4 bits Output only port : 1 port ¥ 4 bits Serial port : 8-bit clock synchronous type LCD drivers : 28 Duty and frame frequency are selectable by the mask options. 1/3 duty, 1/3 bias : Up to 75 segments 1/2 duty, 1/3 bias : Up to 52 segments Halt release timers : 4 Timer frequency is selectable by the mask options. External interrupt : 4 Buzzer output : 1 Clock : 32.768 kHz crystal oscillator Oscillation starts at 0.9 V. Power supply voltage : 1.5 V/3.0 V (selectable by mask option) (See Mask Option List) Packageoptions: 56-pin plastic QFP (QFP56-P-910-0.65...