CDP1872 Просмотр технического описания (PDF) - Intersil

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CDP1872

High-Speed 8-Bit Input and Output Ports

Intersil 

CDP1872C, CDP1874C, CDP1875C

MRD

TPA

MA8

•••

MA15

CDP1802

ADDRESS BUS

CLOCK

D0

D1

D2

CDP1874C D3

D4

D5

D6

D7

CSI

CS2

TPB

DATA BUS

0-7

VDD

DATA BUS

CSI

CLOCK

DO

DI

CDP1874C

CS2

DATA IN

CS2

CS3

CDP1875C

DI

DO

CS1

DATA OUT

FIGURE 6. CDP1874C USED AS AN INPUT PORT AND ADDRESS LATCH WITH CDP1875C USED AS AN OUTPUT PORT

D0 - D7

N0

N1

MRD

N2

CDP1802A

DATA BUS

Y1

Y2

Y3

Y4

Y5

A0

Y6

Y7

A1

A2

CD74HC138

DATA BUS

CS2

CLOCK

CDP1872C

CS1

DATA IN

CS2

CLOCK

CS1

CDP1872C

DATA OUT

FIGURE 7. CDP1872C USED AS AN INPUT PORT AND SELECTED BY CD74HC138

4-80

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