W78C438C40PL 参数 Datasheet PDF下载

W78C438C Data Sheet

8-BIT MICROCONTROLLER

Table of Contents-

1.

2.

3.

4.

5.

GENERAL DESCRIPTION ......................................................................................................... 2

FEATURES ................................................................................................................................. 2

PIN CONFIGURATIONS ............................................................................................................ 3

PIN DESCRIPTION..................................................................................................................... 5

FUNCTIONAL DESCRIPTION ................................................................................................... 7

5.1

5.2

5.3

5.4

5.5

5.6

6.

6.1

6.2

6.3

Dedicated Data and Address Port .................................................................................. 7

Additional I/O Port........................................................................................................... 9

Additional External Interrupt ........................................................................................... 9

Newly Added Special Function Registers .................................................................... 11

Power Reduction Function ........................................................................................... 11

Programming Difference............................................................................................... 12

Absolute Maximum Ratings .......................................................................................... 13

D.C. Characteristics...................................................................................................... 13

A.C. Characteristics ...................................................................................................... 14

6.3.1

6.3.2

6.3.3

Clock Input Waveform ....................................................................................................14

Program Fetch Cycle......................................................................................................14

Data Memory Read/Write Cycle .....................................................................................15

ELECRICAL CHARACTERISTICS ........................................................................................... 13

7.

TIMING WAVEFORMS ............................................................................................................. 16

7.1

7.2

Program Fetch Cycle .................................................................................................... 16

Data Memory Read/Write Cycle ................................................................................... 17

Using 128K

×

8 bit External EPROM (W27E010) ........................................................ 18

84-pin PLCC ................................................................................................................. 20

100-pin QFP.................................................................................................................. 21

8.

9.

TYPICAL APPLICATION CIRCUITS ........................................................................................ 18

8.1

9.1

9.2

PACKAGE DIMENSIONS ......................................................................................................... 20

10.

REVISION HISTORY ................................................................................................................ 22

-1-

Publication Release Date: December 4, 2006

Revision A6