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W78C438C

更新时间: 2024-11-06 02:57:15
品牌 Logo 应用领域
新唐 - NUVOTON /
页数 文件大小 规格书
20页 243K
描述
8-BIT MICROCONTROLLER

W78C438C 数据手册

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W78C438C Data Sheet  
8-BIT MICROCONTROLLER  
Table of Contents-  
1.  
2.  
3.  
4.  
5.  
GENERAL DESCRIPTION ......................................................................................................... 2  
FEATURES................................................................................................................................. 2  
PIN CONFIGURATIONS ............................................................................................................ 3  
PIN DESCRIPTION..................................................................................................................... 4  
FUNCTIONAL DESCRIPTION ................................................................................................... 6  
5.1  
5.2  
5.3  
5.4  
5.5  
5.6  
Dedicated Data and Address Port.................................................................................. 6  
Additional I/O Port........................................................................................................... 8  
Additional External Interrupt ........................................................................................... 8  
Newly Added Special Function Registers .................................................................... 10  
Power Reduction Function ........................................................................................... 10  
Programming Difference............................................................................................... 11  
6.  
ELECRICAL CHARACTERISTICS........................................................................................... 12  
6.1  
6.2  
6.3  
Absolute Maximum Ratings.......................................................................................... 12  
D.C. Characteristics...................................................................................................... 12  
A.C. Characteristics...................................................................................................... 13  
6.3.1 Clock Input Waveform ....................................................................................................13  
6.3.2 Program Fetch Cycle......................................................................................................13  
6.3.3 Data Memory Read/Write Cycle .....................................................................................14  
7.  
TIMING WAVEFORMS............................................................................................................. 15  
7.1  
7.2  
Program Fetch Cycle.................................................................................................... 15  
Data Memory Read/Write Cycle................................................................................... 16  
8.  
TYPICAL APPLICATION CIRCUITS ........................................................................................ 17  
8.1 Using 128K × 8 bit External EPROM (W27E010) ........................................................ 17  
PACKAGE DIMENSIONS......................................................................................................... 19  
9.1 100-pin QFP.................................................................................................................. 19  
9.  
10.  
REVISION HISTORY................................................................................................................ 20  
Publication Release Date: March 10, 2010  
- 1 -  
Revision A7  

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