AT89S52 Atmel Corporation, AT89S52 Datasheet - Page 25

• Manufacturer Part Number: AT89S52
• Manufacturer: Atmel Corporation

Specifications of AT89S52

• Flash (kbytes): 8 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 5.5
• Timers: 3
• Isp: SPI
• Watchdog: Yes

23. Flash Programming and Verification Characteristics (Parallel Mode)
T
Figure 23-1. Flash Programming and Verification Waveforms – Parallel Mode
1919D–MICRO–6/08
Symbol
V
I
I
1/t
t
t
t
t
t
t
t
t
t
t
t
t
t
A
PP
CC
AVGL
GHAX
DVGL
GHDX
EHSH
SHGL
GHSL
GLGH
AVQV
ELQV
EHQZ
GHBL
WC
PP
= 20°C to 30°C, V
CLCL
P1.0 - P1.7
P2.0 - P2.4
ALE/PROG
(RDY/BSY)
(ENABLE)
PORT 0
P3.0
P2.7
EA/V
CC
PP
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
= 4.5 to 5.5V
Setup to PROG Low
Hold After PROG
Supply Current
t
t
SHGL
AVGL
PP
t
EHSH
V
PROGRAMMING
PP
t
DVGL
ADDRESS
DATA IN
t
GLGH
t
GHBL
t
GHDX
t
ELQV
t
GHAX
t
GHSL
LOGIC 1
LOGIC 0
BUSY
t
WC
48 t
48 t
48 t
48 t
48 t
11.5
Min
0.2
10
10
3
0
CLCL
CLCL
CLCL
CLCL
CLCL
VERIFICATION
DATA OUT
ADDRESS
t
AVQV
READY
48 t
48 t
48 t
Max
12.5
1.0
10
30
33
50
1
CLCL
CLCL
CLCL
t
EHQZ
AT89S52
Units
MHz
mA
mA
µs
µs
µs
µs
µs
V
25