4-Bit Microcontroller with Built-in RC Oscillation Type A/D Converter and LCD Driver
E2E0016-38-93 ¡ Semiconductor
¡ Semiconductor MSM6422
High speed and Simple 4-Bit Microcontroller
This version: Sep. 1...
Description
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.
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¡ 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
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¡ 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...
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