W78C54 Ver la hoja de datos (PDF) - Winbond

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Lista de partido

W78C54

8-BIT MICROCONTROLLER

Winbond 

W78C54

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

P2

PCH out

PCH out

PCH out

PCH out

Data Read Cycle

Figure 6. External Program Memory Fetch Cycle

S4 S5 S6 S1 S2 S3 S4 S5

XTAL1

ALE

PSEN

P0

P2

/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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