IS89C52 Просмотр технического описания (PDF) - Integrated Silicon Solution

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производитель

IS89C52

CMOS SINGLE CHIP 8-BIT MICROCONTROLLER with 8-Kbytes of FLASH

Integrated Silicon Solution 

IS89C52

ISSI ®

P2.3-P2.0

P1.7-P1.0

tAVGL

ADDRESS

tGHAX

P0.7-P0.0

tDVGL

EA/VPP

tSHGL

ALE/PROG

tEHSH

DATAIN

tGHDX

VPPH

tGHSL

25 PULSE(1)

tGLGH

tGHGL

P2.6, P2.7 DON'T

P3.6, P3.7 CARE

PROGRAMMING COND.

ADDRESS

tAVQV

DATAOUT

VPPL

tELQV

VERIFY COND.(2)

0V

tELQZ

DON'T

CARE

Figure 29. Flash Memory Programming and Verification Timing Waveform

Notes:

1. One pulse for the main code array, 25 pulses for the encryption array and lock bits.

2. This verify condition is using at main code verification.

3. Power off waveform not shown.

Vcc

P2.3-P2.0

P1.7-P1.0

tPLPH

tELPL

P0.7-P0.0

EA/VPP

ALE/PROG

P2.6, P2.7

P3.6, P3.7

VPPH

tSHGL

tGHSL

tGLGHE

tEHSH

DON'T

CARE

ERASE COND.

0V

0V

ADDRESS

tAVQV

0V

DATAOUT

tPHEH

VPPL

0V

0V

0V

tELQV

tEHVH

0V

VERIFY COND.

tEHQZ

DON'T

CARE

Figure 30. Flash Memory Erase Timing Waveform

Note:

1. The power off and power on waveform can be used in programming or erasing.

42

Integrated Silicon Solution, Inc. — 1-800-379-4774

MC013-1C

11/21/98

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