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W78C438C
GENERAL DESCRIPTION
8-BIT MICROCONTROLLER
The W78C438C is a high-performance single-chip CMOS 8-bit microcontroller that is a derivative of the W78C58 microcontroller family. The W78C438C is functionally compatible with the W78C32, except that it provides either a 64 KB program/1 MB data memory address or memory-mapped chip select logic, five general I/O ports, and four external interrupts.
In the W78C32, two I/O ports, Port 1 and Port 3, are available for general-purpose use (Port 3 also supports alternative functions), and Port 2 and Port 0 are used as the address bus and data bus, respectively.
W78C438C Datasheet
