AT89C51-20PC(2000) View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT89C51-20PC
(Rev.:2000)

8-bit Microcontroller with 4K Bytes Flash

Atmel Corporation 

AT89C51

Flash Programming and Verification Characteristics

TA = 0°C to 70°C, VCC = 5.0 ± 10%

Symbol

Parameter

Min

VPP(1)

IPP(1)

Programming Enable Voltage

Programming Enable Current

11.5

1/tCLCL

Oscillator Frequency

3

tAVGL

tGHAX

tDVGL

tGHDX

tEHSH

tSHGL

tGHSL(1)

Address Setup to PROG Low

Address Hold after PROG

Data Setup to PROG Low

Data Hold after PROG

P2.7 (ENABLE) High to VPP

VPP Setup to PROG Low

VPP Hold after PROG

48tCLCL

48tCLCL

48tCLCL

48tCLCL

48tCLCL

10

10

tGLGH

PROG Width

1

tAVQV

Address to Data Valid

tELQV

ENABLE Low to Data Valid

tEHQZ

Data Float after ENABLE

0

tGHBL

PROG High to BUSY Low

tWC

Byte Write Cycle Time

Note: 1. Only used in 12-volt programming mode.

Max

Units

12.5

V

1.0

mA

24

MHz

µs

µs

110

µs

48tCLCL

48tCLCL

48tCLCL

1.0

µs

2.0

ms

9

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