Rainbow-electronics AT89S52 Manual do Utilizador descarregar pdf (Página 16)

AT89C52

16

Flash Programming and Verification Waveforms - High-voltage Mode (V

PP

=12V)

Flash Programming and Verification Waveforms - Low-voltage Mode (V

PP

=5V)

t

GLGH

t

GHSL

t

AVGL

t

SHGL

t

DVGL

t

GHAX

t

AVQV

t

GHDX

t

EHSH

t

ELQV

t

WC

BUSY

READY

t

GHBL

t

EHQZ

P1.0 - P1.7

P2.0 - P2.4

ALE/PROG

PORT 0

LOGIC 1

LOGIC 0

EA/V

PP

V

PP

P2.7

(ENABLE)

P3.4

(RDY/BSY)

PROGRAMMING

ADDRESS

VERIFICATION

ADDRESS

DATA I N

DATA O U T

(2)

t

GLGH

t

AVGL

t

SHGL

t

DVGL

t

GHAX

t

AVQV

t

GHDX

t

EHSH

t

ELQV

t

WC

BUSY

READY

t

GHBL

t

EHQZ

P1.0 - P1.7

P2.0 - P2.4

ALE/PROG

PORT 0

LOGIC 1

LOGIC 0

EA/V

PP

P2.7

(ENABLE)

P3.4

(RDY/BSY)

PROGRAMMING

ADDRESS

VERIFICATION

ADDRESS

DATA I N

DATA O U T

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 22 23 24

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