Rainbow-electronics W78C438C Bedienungsanleitung PDF herunterladen (Seite 13)

W78C438C

Publication Release Date: July 1998

- 13 - Revision A1

TIMING WAVEFORMS

Program Fetch Cycle

S1 S2

XTAL1

PSEN

S3 S4 S5 S6 S1 S2 S3 S4 S5 S6

AP6<7:0>

AP5<7:0>

DP4<7:0>

address

code

address

APL

PDV

Data Memory Read/Write Cycle

S1 S2 S3S8 S9 S10 S11 S12S4 S5 S6 S7

XTAL1

PSEN

data

addr.

DP4<7:0>

DATA OUT

addr.

ARL

RDV

RDQ

DWL

WDQ

AWL

AP6<7:0>

DPH or HB SFR out

PGM address

DPL or Ri out

AP5<7:0>

AP7<3:0>

addr <19:16> out

(When bit7 of EPMA is 0.)

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Rainbow-electronics W78C438C Bedienungsanleitung Seite 13