Flash programming and verification characteristics, At89c55wd – Rainbow Electronics AT89C55WD User Manual
Page 25
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25
AT89C55WD
1921B–MICRO–09/02
Flash Programming and Verification Characteristics
T
A
= 20°C to 30°C, V
CC
= 4.5V to 5.5V
Symbol
Parameter
Min
Max
Units
V
PP
Programming Supply Voltage
11.5
12.5
V
I
PP
Programming Supply Current
10
mA
I
CC
V
CC
Supply Current
30
mA
1/t
CLCL
Oscillator Frequency
3
33
MHz
t
AVGL
Address Setup to PROG Low
48t
CLCL
t
GHAX
Address Hold After PROG
48t
CLCL
t
DVGL
Data Setup to PROG Low
48t
CLCL
t
GHDX
Data Hold After PROG
48t
CLCL
t
EHSH
P2.7 (ENABLE) High to V
PP
48t
CLCL
t
SHGL
V
PP
Setup to PROG Low
10
µs
t
GHSL
V
PP
Hold After PROG
10
µs
t
GLGH
PROG Width
0.2
1
µs
t
AVQV
Address to Data Valid
48t
CLCL
t
ELQV
ENABLE Low to Data Valid
48t
CLCL
t
EHQZ
Data Float After ENABLE
0
48t
CLCL
t
GHBL
PROG High to BUSY Low
1.0
µs
t
WC
Byte Write Cycle Time
80
µs
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