W78C438C_06 Datasheet, PDF (1/22 Pages) Winbond – 8-BIT MICROCONTROLLER

W78C438C Data Sheet
8-BIT MICROCONTROLLER
Table of Contents-
1. GENERAL DESCRIPTION ......................................................................................................... 2
2. FEATURES ................................................................................................................................. 2
3. PIN CONFIGURATIONS ............................................................................................................ 3
4. PIN DESCRIPTION..................................................................................................................... 5
5. FUNCTIONAL DESCRIPTION ................................................................................................... 7
5.1 Dedicated Data and Address Port .................................................................................. 7
5.2 Additional I/O Port........................................................................................................... 9
5.3 Additional External Interrupt ........................................................................................... 9
5.4 Newly Added Special Function Registers .................................................................... 11
5.5 Power Reduction Function ........................................................................................... 11
5.6 Programming Difference............................................................................................... 12
6. ELECRICAL CHARACTERISTICS ........................................................................................... 13
6.1 Absolute Maximum Ratings .......................................................................................... 13
6.2 D.C. Characteristics...................................................................................................... 13
6.3 A.C. Characteristics ...................................................................................................... 14
6.3.1 Clock Input Waveform ....................................................................................................14
6.3.2 Program Fetch Cycle......................................................................................................14
6.3.3 Data Memory Read/Write Cycle .....................................................................................15
7. TIMING WAVEFORMS ............................................................................................................. 16
7.1 Program Fetch Cycle .................................................................................................... 16
7.2 Data Memory Read/Write Cycle ................................................................................... 17
8. TYPICAL APPLICATION CIRCUITS ........................................................................................ 18
8.1 Using 128K × 8 bit External EPROM (W27E010) ........................................................ 18
9. PACKAGE DIMENSIONS ......................................................................................................... 20
9.1 84-pin PLCC ................................................................................................................. 20
9.2 100-pin QFP.................................................................................................................. 21
10. REVISION HISTORY ................................................................................................................ 22
Publication Release Date: December 4, 2006
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Revision A6