W78C58 Datasheet, PDF(16/22 Page) Winbond

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W78C58 Datasheet, PDF (16/22 Pages) Winbond – 8-BIT MICROCONTROLLER

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W78C58

TIMING WAVEFORMS

Program Fetch Cycle

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

XTAL1

Talw

ALE

Tapl

PSEN

Taas

Tpsw

Taah Tpda

Tpdh,Tpdz

P0 Code

PCL

out

Code

PCL

out

Code

PCL

out

Code

PCL

out

PCH out

Data Read Cycle

Figure 6. External Program Memory Fetch Cycle

S4 S5 S6 S1 S2 S3 S4 S5

XTAL1

ALE

PSEN

/RD

DPL or

RI out

Data

DPH or P2 SFR out

Tdar

Tdda

Tddh,Tddz

Tdrd

Figure7. External Data Memory Read Cycle

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