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AT87F51RC-20JI データシートの表示(PDF) - Atmel Corporation
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AT87F51RC-20JI
8-bit Microcontroller with 32K Bytes QuickFlash™
Atmel Corporation
AT87F51RC-20JI Datasheet PDF : 25 Pages
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AT87F51RC
Figure 4.
Timer 2 Auto Reload Mode (DCEN = 1)
(DOWN COUNTING RELOAD VALUE)
0FFH
0FFH
TOGGLE
EXF2
OSC
12
T2 PIN
C/T2 = 0
C/T2 = 1
TH2
CONTROL
TR2
OVERFLOW
TL2
RCAP2H RCAP2L
(UP COUNTING RELOAD VALUE)
TF2
TIMER 2
INTERRUPT
COUNT
DIRECTION
1=UP
0=DO
Figure 5.
Timer 2 in Baud Rate Generator Mode
T2EX PIN
TIMER 1 OVERFLOW
NOTE: OSC. FREQ. IS DIVIDED BY 2, NOT 12
OSC
÷
2
C/T2 = 0
T2 PIN
T2EX PIN
C/T2 = 1
TRANSITION
DETECTOR
TH2
TL2
CONTROL
TR2
RCAP2H RCAP2L
CONTROL
EXEN2
EXF2
÷
2
"0" "1"
SMOD1
"1" "0"
"1" "0"
TIMER 2
INTERRUPT
RCLK
÷
16
Rx
CLOCK
TCLK
÷
16
Tx
CLOCK
11
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