at89c51rc-33pc ATMEL Corporation, at89c51rc-33pc Datasheet - Page 26

• Manufacturer Part Number: at89c51rc-33pc
• Description: 8-bit Microcontroller With 32k Bytes Flash
• Manufacturer: ATMEL Corporation

24. Flash Programming and Verification Waveforms
25. Lock Bit Programming
26. Parallel Chip Erase Mode
26
Test Conditions
AT89C51RC
ALE/PROG
V
CC
P1.0 - P1.7
P2.0 - P2.5
Lockbit_1, 2 or 3
P3<0>
Test Conditions
ALE/PROG
(RDY/BSY)
Setup
= 6.5V
(ENABLE)
PORT 0
P3.0
ALE/PROG
V
Data Setup
P2.7
EA/V
CC
P3.4
= 6.5V
Setup
PP
200 ns
Erase
t
t
SHGL
AVGL
t
Erase
EHSH
V
DC
PROGRAMMING
PP
t
DVGL
ADDRESS
DATA IN
t
100 µs
GLGH
t
GHBL
t
GHDX
10 ms
t
200 ns
ELQV
t
GHAX
t
GHSL
Test Conditions Setup
LOGIC 1
LOGIC 0
BUSY
t
WC
Erase
VERIFICATION
DATA OUT
ADDRESS
t
AVQV
Erase
V
READY
DC
CC
Wait 10 ms to reload
new lock bit status
= 4.5V to 5.5V
V
CC
t
= 4.5V to 5.5V
Wait 10 ms before
EHQZ
reprogramming
1920C–MICRO–03/05