AT89C55WD Atmel Corporation, AT89C55WD Datasheet - Page 24

• Manufacturer Part Number: AT89C55WD
• Manufacturer: Atmel Corporation

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

22. Flash Programming and Verification Characteristics
T
24
A
Symbol
V
I
I
1/t
t
t
t
t
t
t
t
t
t
t
t
t
t
PP
CC
AVGL
GHAX
DVGL
GHDX
EHSH
SHGL
GHSL
GLGH
AVQV
ELQV
EHQZ
GHBL
WC
PP
= 20°C to 30°C, V
CLCL
AT89C55WD
CC
Parameter
Programming Supply Voltage
Programming Supply Current
V
Oscillator Frequency
Address Setup to PROG Low
Address Hold After PROG
Data Setup to PROG Low
Data Hold After PROG
P2.7 (ENABLE) High to V
V
V
PROG Width
Address to Data Valid
ENABLE Low to Data Valid
Data Float After ENABLE
PROG High to BUSY Low
Byte Write Cycle Time
CC
PP
PP
= 4.5V to 5.5V
Setup to PROG Low
Hold After PROG
Supply Current
PP
48t
48t
48t
48t
48t
11.5
Min
0.2
10
10
3
0
CLCL
CLCL
CLCL
CLCL
CLCL
48t
48t
48t
Max
12.5
1.0
10
30
33
80
1
CLCL
CLCL
CLCL
1921D–MICRO–6/08
Units
MHz
mA
mA
µs
µs
µs
µs
µs
V