AT89V51 View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT89V51

8-bit Microcontroller with 4K Bytes Flash

Atmel Corporation 

Flash Programming and Verification Waveforms - High-voltage Mode (VPP = 12V)

P1.0 - P1.7

P2.0 - P2.3

PROGRAMMING

ADDRESS

VERIFICATION

ADDRESS

tAVQV

PORT 0

tAVGL

DATA IN

tDVGL tGHDX

tGHAX

DATA OUT

ALE/PROG

EA/VPP

tSHGL

VPP

tGLGH

tGHSL

LOGIC 1

LOGIC 0

P2.7

(ENABLE)

P3.4

(RDY/BSY)

tEHSH

tGHBL

tELQV

BUSY

tWC

tEHQZ

READY

Flash Programming and Verification Waveforms - Low-voltage Mode (VPP = 5V)

P1.0 - P1.7

P2.0 - P2.3

PORT 0

ALE/PROG

PROGRAMMING

ADDRESS

tAVGL

tSHGL

DATA IN

tDVGL tGHDX

tGLGH

tGHAX

VERIFICATION

ADDRESS

tAVQV

DATA OUT

EA/VPP

LOGIC 1

LOGIC 0

P2.7

(ENABLE)

P3.4

(RDY/BSY)

tEHSH

tGHBL

tELQV

BUSY

tWC

tEHQZ

READY

8

AT89C51

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