AT89C51
Flash Programming and Verification Characteristics
T
A
= 0°C to 70°C, V
CC
= 5.0
±
10%
Symbol
V
PP(1)
I
PP(1)
1/t
CLCL
t
AVGL
t
GHAX
t
DVGL
t
GHDX
t
EHSH
t
SHGL
t
GHSL(1)
t
GLGH
t
AVQV
t
ELQV
t
EHQZ
t
GHBL
t
WC
Note:
Parameter
Programming Enable Voltage
Programming Enable Current
Oscillator Frequency
Address Setup to PROG Low
Address Hold after PROG
Data Setup to PROG Low
Data Hold after PROG
P2.7 (ENABLE) High to V
PP
V
PP
Setup to PROG Low
V
PP
Hold after PROG
PROG Width
Address to Data Valid
ENABLE Low to Data Valid
Data Float after ENABLE
PROG High to BUSY Low
Byte Write Cycle Time
1. Only used in 12-volt programming mode.
Min
11.5
Max
12.5
1.0
Units
V
mA
MHz
3
48t
CLCL
48t
CLCL
48t
CLCL
48t
CLCL
48t
CLCL
10
10
1
24
µs
µs
110
48t
CLCL
48t
CLCL
µs
0
48t
CLCL
1.0
2.0
µs
ms
9
ATMEL [ ATMEL CORPORATION ]
