AT89 ATMEL Corporation, AT89 Datasheet - Page 8

• Manufacturer Part Number: AT89
• Description: 8-Bit Microcontroller with 4K Bytes Flash
• Manufacturer: ATMEL Corporation

Flash Programming and Verification Waveforms - High Voltage Mode (V
Flash Programming and Verification Waveforms - Low Voltage Mode (V
4-36
P1.0 - P1.7
P2.0 - P2.3
P1.0 - P1.7
P2.0 - P2.3
(RDY/BSY)
(RDY/BSY)
ALE/PROG
ALE/PROG
(ENABLE)
(ENABLE)
PORT 0
PORT 0
P3.4
P3.4
P2.7
P2.7
EA/V
EA/V
PP
PP
AT89C51
t
t
t
t
SHGL
SHGL
AVGL
AVGL
t
t
EHSH
EHSH
V
PROGRAMMING
PROGRAMMING
PP
t
t
DVGL
DVGL
ADDRESS
ADDRESS
DATA IN
DATA IN
t
t
GLGH
GLGH
t
t
GHBL
GHBL
t
t
GHDX
GHDX
t
t
ELQV
ELQV
t
t
GHAX
GHAX
LOGIC 1
LOGIC 0
t
GHSL
LOGIC 1
LOGIC 0
BUSY
BUSY
t
t
WC
WC
VERIFICATION
VERIFICATION
DATA OUT
DATA OUT
ADDRESS
ADDRESS
t
t
AVQV
AVQV
READY
READY
t
t
EHQZ
EHQZ
PP
PP
= 5V)
= 12V)