Flash Programming and Verification Waveforms - High-voltage Mode (V
PP
= 12V)
P1.0 - P1.7
P2.0 - P2.3
PORT 0
t
AVGL
ALE/PROG
t
SHGL
V
PP
PROGRAMMING
ADDRESS
VERIFICATION
ADDRESS
t
AVQV
DATA IN
DATA OUT
t
DVGL
t
GHDX
t
GHAX
t
GHSL
LOGIC 1
LOGIC 0
t
GLGH
EA/V
PP
t
EHSH
P2.7
(ENABLE)
t
GHBL
P3.4
(RDY/BSY)
t
ELQV
t
EHQZ
BUSY
READY
t
WC
Flash Programming and Verification Waveforms - Low-voltage Mode (V
PP
= 5V)
P1.0 - P1.7
P2.0 - P2.3
PORT 0
t
AVGL
ALE/PROG
t
SHGL
EA/V
PP
t
EHSH
P2.7
(ENABLE)
t
GHBL
P3.4
(RDY/BSY)
BUSY
READY
PROGRAMMING
ADDRESS
VERIFICATION
ADDRESS
t
AVQV
DATA IN
DATA OUT
t
DVGL
t
GHDX
t
GHAX
t
GLGH
LOGIC 1
LOGIC 0
t
ELQV
t
EHQZ
t
WC
8
AT89C51