at87f52-20qi ATMEL Corporation, at87f52-20qi Datasheet - Page 8
at87f52-20qi
Manufacturer Part Number
at87f52-20qi
Description
At87f52 8-bit Microcontroller With 8k Bytes Quickflash
Manufacturer
ATMEL Corporation
Datasheet
1.AT87F52-20QI.pdf
(24 pages)
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Figure 3. Timer 2 Auto Reload Mode (DCEN = 1)
Figure 4. Timer 2 in Baud Rate Generator Mode
8
T2EX PIN
OSC
OSC
T2 PIN
÷
T2 PIN
12
÷
2
TRANSITION
DETECTOR
NOTE: OSC. FREQ. IS DIVIDED BY 2, NOT 12
C/T2 = 0
C/T2 = 1
C/T2 = 0
C/T2 = 1
Not
TR2
EXEN2
TR2
CONTROL
CONTROL
CONTROL
(DOWN COUNTING RELOAD VALUE)
(UP COUNTING RELOAD VALUE)
RCAP2H
0FFH
TH2
RCAP2H
TH2
EXF2
RCAP2L
0FFH
TL2
RCAP2L
TL2
OVERFLOW
INTERRUPT
TIMER 2
T2EX PIN
÷
2
"1"
"1"
TIMER 1 OVERFLOW
COUNT
DIRECTION
1=UP
0=DOWN
"0"
"0"
"0"
TOGGLE
INTERRUPT
"1"
TIMER 2
÷
TF2
÷
SMOD1
RCLK
TCLK
16
16
CLOCK
CLOCK
EXF2
Rx
Tx
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