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Intel mcs-48 Microscope & Magnifier User Manual

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BUS

PORT 1

804B

PORT 2

8243

EXPANDER

INTERFACE

-=-

I/O

cs

P'

PROG

TEST

P5

8048

INPUTS

8243

P6

P20-P23

DATA IN

P2

P7

OUTPUT EXPANDER TIMING

P20-P23

--(

.....

_--'X

.....

___

...J)r---

ADDRESS

14-BITS)

DATA (4-8IT8)

BITS

3,2

OO}

REAO

01

WRITE

10

OR

11_ AND

I/O

I/O

I/O

I/O

BITS 1,0

OO~

O1J

PORT

Hl

ADDRESS

"

PROG.-----------------~------------------+_----------------~~

________________

~

USING MULTIPLE 8243'5

6-62

AFN-oQ214A-08

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