8-bit MCU Series (80C51-based)

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. To enable Port 0 and Port 2 to also be used as general purpose I/O ports, the W78C438C provides two dedicated address ports (AP5 and AP6) that serve as address output for 64 KB of memory and one address/data port (DP4) that serves as ROM code input and external RAM data input/output. Unlike the W78C32, this product does not require an external latch device for multiplexing low byte addresses. The W78C438C also provides four pins (AP7.0*AP7.3) to support either 64 KB program/1 MB data memory space or memory-mapped chip select Logic one parallel I/O port (Port 8) without bit addressing mode, and two additional external interrupts.
By Winbond Electronics Corp America
W78C438C 's PackagesW78C438C 's pdf datasheet
W78C438C40PL
W78C438C40FL




W78C438C Pinout, Pinouts
W78C438C pinout,Pin out
This is one package pinout of W78C438C,If you need more pinouts please download W78C438C's pdf datasheet.

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