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AT89C52-24JI Datasheet(PDF) 9 Page - ATMEL Corporation

Part # AT89C52-24JI
Description  8-bit Microcontroller with 8K Bytes Flash
Download  24 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C52-24JI Datasheet(HTML) 9 Page - ATMEL Corporation

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AT89C52
9
Figure 3. Timer 2 Auto Reload Mode (DCEN = 1)
Figure 4. Timer 2 in Baud Rate Generator Mode
OSC
EXF2
TF2
T2EX PIN
COUNT
DIRECTION
1=UP
0=DOWN
T2 PIN
TR2
CONTROL
OVERFLOW
(DOWN COUNTING RELOAD VALUE)
(UP COUNTING RELOAD VALUE)
TOGGLE
TIMER 2
INTERRUPT
12
RCAP2L
RCAP2H
0FFH
0FFH
TH2
TL2
C/T2 = 0
C/T2 = 1
÷
OSC
SMOD1
RCLK
TCLK
Rx
CLOCK
Tx
CLOCK
T2EX PIN
T2 PIN
TR2
CONTROL
"1"
"1"
"1"
"0"
"0"
"0"
TIMER 1 OVERFLOW
NOTE: OSC. FREQ. IS DIVIDED BY 2, NOT 12
TIMER 2
INTERRUPT
2
2
16
16
RCAP2L
RCAP2H
TH2
TL2
C/T2 = 0
C/T2 = 1
EXF2
CONTROL
TRANSITION
DETECTOR
EXEN2
÷
÷
÷
÷


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