User Manual

AT89LV52
4-96
Figure 9.
Programming the Flash Memory
Figure 10.
Verifying the Flash Memory
Flash Programming and Verification Characteristics
T
A
= 0°C to 70°C, V
CC
= 5.0 ± 10%
Note: 1. Only used in 12-volt programming mode.
V
CC
V
CC
Symbol Parameter Min Max Units
V
PP
(1)
Programming Enable Voltage 11.5 12.5 V
I
PP
(1)
Programming Enable Current 25
µ
A
1/t
CLCL
Oscillator Frequency 3 12 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
µ
s
t
GHSL
(1)
V
PP
Hold After PROG 10
µ
s
t
GLGH
PROG Width 1 110
µ
s
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
µ
s
t
WC
Byte Write Cycle Time 2.0 ms