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AT89S52 Datasheet(PDF) 25 Page - ATMEL Corporation

Part # AT89S52
Description  8-bit Microcontroller with 8K Bytes In-System Programmable Flash
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89S52 Datasheet(HTML) 25 Page - ATMEL Corporation

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25
1919D–MICRO–6/08
AT89S52
Figure 23-1. Flash Programming and Verification Waveforms – Parallel Mode
23. Flash Programming and Verification Characteristics (Parallel Mode)
T
A = 20°C to 30°C, VCC = 4.5 to 5.5V
Symbol
Parameter
Min
Max
Units
V
PP
Programming Supply Voltage
11.5
12.5
V
IPP
Programming Supply Current
10
mA
I
CC
V
CC Supply Current
30
mA
1/tCLCL
Oscillator Frequency
3
33
MHz
tAVGL
Address Setup to PROG Low
48 tCLCL
t
GHAX
Address Hold After PROG
48 t
CLCL
tDVGL
Data Setup to PROG Low
48 tCLCL
tGHDX
Data Hold After PROG
48 tCLCL
t
EHSH
P2.7 (ENABLE) High to V
PP
48 t
CLCL
tSHGL
VPP Setup to PROG Low
10
µs
tGHSL
VPP Hold After PROG
10
µs
t
GLGH
PROG Width
0.2
1
µs
tAVQV
Address to Data Valid
48 tCLCL
tELQV
ENABLE Low to Data Valid
48 tCLCL
t
EHQZ
Data Float After ENABLE
0
48 t
CLCL
tGHBL
PROG High to BUSY Low
1.0
µs
t
WC
Byte Write Cycle Time
50
µs
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)
P3.0
(RDY/BSY)
PROGRAMMING
ADDRESS
VERIFICATION
ADDRESS
DATA IN
DATA OUT


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