Datasheet

25
1919C–MICRO–3/05
AT89S52
Figure 23-1. Flash Programming and Verification Waveforms – Parallel Mode
23. Flash Programming and Verification Characteristics (Parallel Mode)
T
A
= 20°C to 30°C, V
CC
= 4.5 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 48 t
CLCL
t
GHAX
Address Hold After PROG 48 t
CLCL
t
DVGL
Data Setup to PROG Low 48 t
CLCL
t
GHDX
Data Hold After PROG 48 t
CLCL
t
EHSH
P2.7 (ENABLE) High to V
PP
48 t
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 48 t
CLCL
t
ELQV
ENABLE Low to Data Valid 48 t
CLCL
t
EHQZ
Data Float After ENABLE 0 48 t
CLCL
t
GHBL
PROG High to BUSY Low 1.0 µs
t
WC
Byte Write Cycle Time 50 µs
t
GLGH
t
GHSL
t
AVGL
t
SHGL
t
DVGL
t
GHAX
t
AVQV
t
GHDX
t
EHSH
t
ELQV
t
WC
BUSY
READY
t
GHBL
t
EHQZ
P1.0 - P1.7
P2.0 - P2.4
ALE/PROG
PORT 0
LOGIC 1
LOGIC 0
EA/V
PP
V
PP
P2.7
(ENABLE)
P3.0
(RDY/BSY)
PROGRAMMING
ADDRESS
VERIFICATION
ADDRESS
DATA IN
DATA OUT