Rainbow Electronics АТ89С2051 - Manual (Page 8)

AT89C2051
8
Note: 1. Only used in 12-volt programming mode.
Flash Programming and Verification Waveforms
Flash Programming and Verification Characteristics
T
A
= 0°C to 70°C, V
CC
= 5.0
± 10%
Symbol Parameter Min Max Units
V
PP
Programming Enable Voltage 11.5 12.5 V
I
PP
Programming Enable Current 250 µA
t
DVGL
Data Setup to PROG Low 1.0
µs
t
GHDX
Data Hold after PROG 1.0 µs
t
EHSH
P3.4 (ENABLE) High to V
PP
1.0 µs
t
SHGL
V
PP
Setup to PROG Low 10 µs
t
GHSL
V
PP
Hold after PROG 10
µs
t
GLGH
PROG Width 1 110 µs
t
ELQV
ENABLE Low to Data Valid 1.0
µs
t
EHQZ
Data Float after ENABLE 0 1.0 µs
t
GHBL
PROG High to BUSY Low 50 ns
t
WC
Byte Write Cycle Time 2.0 ms
t
BHIH
RDY/BSY\ to Increment Clock Delay 1.0
µs
t
IHIL
Increment Clock High 200 ns