Datasheet > W78C438CP-24

W78C438CP-24

更新时间： 2024-11-06 12:47:23

品牌	Logo	应用领域
华邦 - WINBOND		微控制器
页数	文件大小	规格书
16页	149K
描述
8-BIT MICROCONTROLLER

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数据手册

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W78C438CP-24 数据手册

W78C438C

8-BIT MICROCONTROLLER

GENERAL DESCRIPTION

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 (INT2 , INT3 ) .

The W78C438C is programmed in a manner fully compatible with that used to program the W78C32,

except that the external data RAM is accessed by the "MOVX @Ri" instruction. Address paging is

performed by loading page addresses into the HB (high byte) register, which is not a standard register

in the W78C32, before execution of the "MOVX @Ri" instruction.

FEATURES

· 8-bit CMOS microcontroller

· Fully static design

· DC to 40 MHz operation

· ROM-less operation

· 256-byte on-chip scratchpad RAM

· Either 64 KB program/1 MB data memory address space or 4 memory-mapped chip select pins

· One 8-bit data/address port

· Two 8-bit and one 4-bit (optional) address ports

· Five 8-bit bidirectional I/O ports

- Four 8-bit bit-addressable I/O ports and one 8-bit parallel I/O port

· Eight-source, two-level interrupt capability

· Three 16-bit timer/counters

· Four external interrupts

· One full-duplex serial channel

· Built-in power management

- Idle mode

- Power-down mode

· Packages:

- 84-pin PLCC: W78C438CP-24/40

- 100-pin PQFP: W78C438CF-24/40

Publication Release Date: July 1998

- 1 -

Revision A1

12 3 4 5 6 7...16

中文翻译

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与W78C438CP-24相关器件

型号	品牌	获取价格	描述	数据表
W78C438CP-24/40	WINBOND	获取价格	Microcontroller, 8-Bit, 40MHz, CMOS, PQCC84, PLASTIC, LCC-84
W78C438CP-40	WINBOND	获取价格	8-BIT MICROCONTROLLER
W78C438F-16	WINBOND	获取价格	Microcontroller, 8-Bit, 40MHz, CMOS, PQFP100, PLASTIC, QFP-100
W78C438F-24	WINBOND	获取价格	Microcontroller, 8-Bit, 40MHz, CMOS, PQFP100, PLASTIC, QFP-100
W78C438F-33	WINBOND	获取价格	Microcontroller, 8-Bit, 40MHz, CMOS, PQFP100, PLASTIC, QFP-100
W78C438F-40	WINBOND	获取价格	Microcontroller, 8-Bit, 40MHz, CMOS, PQFP100, PLASTIC, QFP-100
W78C458	WINBOND	获取价格	8-BIT EMULATION MICROCONTROLLER
W78C458F-16	ETC	获取价格	8-Bit Microcontroller
W78C458F-24	ETC	获取价格	8-Bit Microcontroller
W78C458F-33	ETC	获取价格	8-Bit Microcontroller

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