AT89C55WD Atmel Corporation, AT89C55WD Datasheet - Page 25
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AT89C55WD
Manufacturer Part Number
AT89C55WD
Description
Manufacturer
Atmel Corporation
Datasheet
1.AT89C55WD.pdf
(35 pages)
Specifications of AT89C55WD
Flash (kbytes)
20 Kbytes
Max. Operating Frequency
24 MHz
Cpu
8051-12C
Max I/o Pins
32
Uart
1
Sram (kbytes)
0.25
Operating Voltage (vcc)
4.0 to 6.0
Timers
3
Watchdog
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AT89C55WD
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT89C55WD-24AC
Manufacturer:
ATMEL
Quantity:
508
Company:
Part Number:
AT89C55WD-24AU
Manufacturer:
REALTEK
Quantity:
300
Company:
Part Number:
AT89C55WD-24AU
Manufacturer:
ATMEL
Quantity:
27 947
Part Number:
AT89C55WD-24AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT89C55WD-24JC
Manufacturer:
ATM
Quantity:
2 340
Company:
Part Number:
AT89C55WD-24JC
Manufacturer:
ATM
Quantity:
2 340
Part Number:
AT89C55WD-24JC
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
23. Flash Programming and Verification Waveforms
24. Lock Bit Programming
25. Parallel Chip Erase Mode
1921D–MICRO–6/08
Test Conditions
ALE/PROG
V
Lockbit_1, 2 or 3
CC
Test Conditions
P3<0>
Setup
= 6.5V
V
ALE/PROG
Data Setup
CC
P1.0 - P1.7
P2.0 - P2.5
ALE/PROG
(RDY/BSY)
(ENABLE)
= 6.5V
Setup
PORT 0
P3.0
P2.7
EA/V
200 ns
P3.4
PP
Erase
t
t
SHGL
AVGL
Erase
DC
t
EHSH
V
PROGRAMMING
PP
t
DVGL
ADDRESS
100 µs
DATA IN
t
GLGH
t
GHBL
t
GHDX
10 ms
t
ELQV
t
200 ns
GHAX
t
GHSL
LOGIC 1
LOGIC 0
BUSY
Test Conditions Setup
t
WC
Erase
VERIFICATION
DATA OUT
ADDRESS
t
AVQV
READY
V
CC
Wait 10 ms to reload
new lock bit status
Erase
DC
= 4.5V to 5.5V
t
V
EHQZ
CC
AT89C55WD
= 4.5V to 5.5V
Wait 10 ms before
reprogramming
25