W78C32CF-40 Просмотр технического описания (PDF) - Winbond

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W78C32CF-40

8-BIT MICROCONTROLLER

Winbond 

W78C32C

Port Access Cycle

PARAMETER

SYMBOL MIN. TYP. MAX. UNIT

Port Input Setup to ALE Low

TPDS

1 TCP

-

-

nS

Port Input Hold from ALE Low

TPDH

0

-

-

nS

Port Output to ALE

TPDA

1 TCP

-

-

nS

Note: Ports are read during S5P2, and output data becomes available at the end of S6P2. The timing data are referenced to

ALE, since it provides a convenient reference.

TIMING WAVEFORMS

Program Fetch Cycle

XTAL1

S1 S2 S3 S4 S5 S6 S1 S2 S3 S4 S5 S6

ALE

PSEN

PORT 2

TAPL

TPSW

TAAS

TAAH

TPDA

PORT 0

Code

A0-A7

Data

TALW

TPDH, TPDZ

A0-A7

Code A0-A7

Data A0-A7

Data Read Cycle

XTAL1

ALE

PSEN

PORT 2

PORT 0

RD

S4 S5 S6 S1 S2 S3 S4 S5 S6 S1 S2 S3

A0-A7

TDAR

A8-A15

TDDA

DATA

T DDH, T DDZ

TDRD

Publication Release Date: July 1999

-9-

Revision A2

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