AT89C52 View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT89C52

8-Bit Microcontroller with 8K Bytes Flash

Atmel Corporation 

Figure 9. Programming the Flash Memory

A0 - A7

ADDR.

OOOOH/1FFFH

A8 - A12

AT89C52

P1

VCC

P2.0 - P2.4 P0

P2.6

SEE FLASH

PROGRAMMING

MODES TABLE

P2.7

ALE

P3.6

P3.7

XTAL 2

EA

Figure 10. Verifying the Flash Memory

+5V

PGM

DATA

PROG

VIH/VPP

A0 - A7

ADDR.

OOOOH/1FFFH

A8 - A12

AT89C52

P1

VCC

P2.0 - P2.4 P0

P2.6

SEE FLASH

PROGRAMMING

MODES TABLE

P2.7

ALE

P3.6

P3.7

XTAL 2

EA

+5V

PGM DATA

(USE 10K

PULLUPS)

VIH

3-24 MHz

3-24 MHz

XTAL1

RST

VIH

GND

PSEN

XTAL1

RST

VIH

GND

PSEN

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

Address Setup to PROG Low

48tCLCL

tGHAX

Address Hold After PROG

48tCLCL

tDVGL

Data Setup to PROG Low

48tCLCL

tGHDX

Data Hold After PROG

48tCLCL

tEHSH

P2.7 (ENABLE) High to VPP

48tCLCL

tSHGL

VPP Setup to PROG Low

10

tGHSL(1)

VPP Hold After PROG

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.

4-74

AT89C52

Max

Units

12.5

V

1.0

mA

24

MHz

µs

µs

110

µs

48tCLCL

48tCLCL

48tCLCL

1.0

µs

2.0

ms

Share Link: