Atmel AT89C2051 Manual page 11

14. Flash Programming and Verification Characteristics
= 5.0 ± 10%
T = 0°C to 70°C, V
A CC
Symbol Parameter
V Programming Enable Voltage
PP
I Programming Enable Current
PP
t
Data Setup to PROG Low
DVGL
t Data Hold after PROG
GHDX
t P3.4 (ENABLE) High to V
EHSH
t V
SHGL PP
t V
GHSL PP
t PROG Width
GLGH
t ENABLE Low to Data Valid
ELQV
t Data Float after ENABLE
EHQZ
t PROG High to BUSY Low
GHBL
t Byte Write Cycle Time
WC
t RDY/BSY\ to Increment Clock Delay
BHIH
t Increment Clock High
IHIL
Note: 1. Only used in 12-volt programming mode.
15. Flash Programming and Verification Waveforms
0368G–MICRO–6/05
PP
Setup to PROG Low
Hold after PROG
AT89C2051
Min Max Units
11.5 12.5
250
1.0
1.0
1.0
10
10
1 110
1.0
0 1.0
50
2.0
1.0
200
V
µA
µs
µs
µs
µs
µs
µs
µs
µs
ns
ms
µs
ns
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