MSM64155A

E2E0030-38-95 ¡ Semiconductor ¡ Semiconductor MSM64155A/64155AL GENERAL DESCRIPTION This version: Sep. 1998 MSM64155A/64155AL Previous version: Mar. 1996 4-Bit Microcontroller with Built-in LCD Driver and Melody Circuit The MSM64155A (1.5 V)/64155AL (3.0 V) is a high-performance 4-bit microcontroller that incorporates Oki-original CPU core nX-4/20. The MSM64155A/64155AL has an LCD driver for up to 240 segments, an event counter, and melody circuits. It is best suited for applications such as clocks and LCD games. FEATURES Operating range Operating voltage Operating temperature Operating frequency : 1.5 V/3.0 V : –40 to +70 °C : 32.768 kHz crystal oscillation Approx. 32 kHz RC oscillation Supply current (Typ.) : 0.9 mA (3.0 V at HALT mode) Minimum instruction execution time : 91 ms General memory space : 4064 bytes Local memory space : 256 nibbles LCD driver : 64 Common driver ¥ 4 Segment driver ¥ 60 1/4 duty, 1/3 bias; 240 segments (60 ¥ 4) 1/3 duty, 1/3 bias; 180 segments (60 ¥ 3) I/O port Input-output port : 2 ports ¥ 4 bits (open-drain output/CMOS output selectable; pull-down resistor input/high-impedance input selectable) Input port : 1 port ¥ 2 bits (pull-down resistor input/high-impedance input selectable) 1 port ¥ 4 bits (pull-down resistor input/high-impedance input selectable) Output port : 1 port ¥ 4 bits (CMOS output) Event counter : 1 channel Melody output :2 Interrupts : 10 sources External 4, time base 4, melody 2 Package: 100-pin plast...