AT89S52 Atmel Corporation, AT89S52 Datasheet - Page 14
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AT89S52
Manufacturer Part Number
AT89S52
Description
Manufacturer
Atmel Corporation
Datasheet
1.AT89S52.pdf
(38 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT89S52
Manufacturer:
ATM
Quantity:
5 300
Part Number:
AT89S52
Manufacturer:
CN/如韵
Quantity:
20 000
Part Number:
AT89S52-16JC
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT89S52-24AI
Manufacturer:
ATMEL
Quantity:
4 233
Part Number:
AT89S52-24AI
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Part Number:
AT89S52-24AJ
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT89S52-24AU
Manufacturer:
FEELING
Quantity:
43 000
Company:
Part Number:
AT89S52-24AU
Manufacturer:
ATMEL
Quantity:
930 880
Part Number:
AT89S52-24AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT89S52-24JC
Manufacturer:
ATMEL
Quantity:
447
Figure 10-2. Timer 2 Auto Reload Mode (DCEN = 0)
Figure 10-3. Timer 2 Auto Reload Mode (DCEN = 1)
14
T2EX PIN
OSC
AT89S52
OSC
T2 PIN
T2 PIN
÷
12
÷12
TRANSITION
DETECTOR
C/T2 = 0
C/T2 = 1
C/T2 = 0
C/T2 = 1
TR2
CONTROL
EXEN2
(DOWN COUNTING RELOAD VALUE)
(UP COUNTING RELOAD VALUE)
CONTROL
TR2
CONTR OL
RELO AD
RCAP2H
0FFH
TH2
RCAP2L
0FFH
RCAP2H
TL2
TH2
OVERFLOW
RCAP2L
TL2
T2EX PIN
COUNT
DIRECTION
1=UP
0=DOWN
OVERFLOW
EXF2
TF2
TOGGLE
INTERRUPT
TIMER 2
TF2
INTERRUPT
TIMER 2
1919D–MICRO–6/08
EXF2