Oki Electric Industry MSM82C43
The MSM82C43 is an input/output port expander device based on CMOS technology and designed to operate at low power consumption levels.GENERAL DESCRIPTION
In systems employing the MSM80C48/49 8–bit single chip microcomputers, 4–bit data can be expanded by dividing between four I/O lines by executing the MOVDA, Pp, A and ORLDPp, A instructions.FEATURES
● CMOS technology for low power consumption● 2.5 to 6 V single power supply (dependent on MSM80C48/49 operating frequency.)
● Fully static operation
● Bidirectional I/O ports
● TTL coimpatible (ports 4 thru 7)
● Functional compatiblity with Intel i8243
● Package options 24 pin Plastic DIP (DIP24–P–600-2.54) : (Product name : MSM82C43RS) 24 pin Plastic SOP (SOP24–P–430–1.27-K) : (Product name : MSM82C43GS-K) 1/13 ¡ Semiconductor MSM82C43 FUNCTIONAL BLOOK DIAGRAM ADDRESS DECODER LATCH 4 PORT 4 INPUT BUFFER INSTRUCTION DECODER LATCH 4 PORT 5 PORT 2 4 MUX TEMP 4 INPUT BUFFER LATCH PROG CS CONTROL AND/OR LOGIC INPUT 4 4 PORT 6 BUFFER RESET CIRCUIT LATCH 4 PORT 7 INPUT BUFFER 2/13 ¡ Semiconductor MSM82C43 PIN CONFIGURATION (TOP VIEW) MSM82C43RS P50 P40 P41 P42 P43 CS PROG P2...