MSM6422

E2E0016-38-93 ¡ Semiconductor ¡ Semiconductor MSM6422 High speed and Simple 4-Bit Microcontroller This version: Sep. 1998 MSM6422 Previous version: Mar. 1996 GENERAL DESCRIPTION The MSM6422 is a low-power, single-chip device implemented in complementary metal-oxide semiconductor technology. The MSM6422 can be used in place of logic ICs configured around a main CPU, or for small-scale systems such as home electronic equipment. FEATURES ROM RAM I/O port Input-output port : 2048 words ¥ 8 bits : 64 words ¥ 4 bits : 4 ports ¥ 4 bits (pseudo bidirectional configuration) 1 port ¥ 2 bits (pseudo bidirectional configuration) Input port : 1 port ¥ 1 bit (combined use with an interrupt input) Instructions : 63 Two interrupt sources (1 internal, 1 external) Power down features Minimum instruction execution time : 952 ns @ 4.2 MHz clock Crystal and ceramic oscillation Single 5 V power supply Package options: 24-pin plastic DIP (DIP24-P-600-2.54) : (Product name : MSM6422-¥¥RS) 24-pin plastic SOP (SOP24-P-430-1.27-K) : (Product name : MSM6422-¥¥GS-K) ¥¥ indicates a code number. 1/10 ¡ Semiconductor MSM6422 BLOCK DIAGRAM RAM 64 ¥ 4 bits ACC DEC C SP LR HR ALU PC INST DEC ROM 2048 ¥ 8 bits DEC INT.C P5 P4 P3 P1 P0 P2 12-bitTBC Timing & Control 10 3 21 0 3 21 0 3 21 0 3 21 0 0/INT GND VDD OSC1 OSC0 RESET 2/10 ¡ Semiconductor MSM6422 PIN CONFIGURATION (TOP VIEW) P2.0/INT P0.0 P0.1 P0.2 P0.3 P1.0 P1.1 P1.2 P1.3 1 2 3 4 5 6 7 8 9 24 23 22 21 20 19 1...