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IS89C52 データシートの表示(PDF) - Integrated Silicon Solution
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IS89C52
CMOS SINGLE CHIP 8-BIT MICROCONTROLLER with 8-Kbytes of FLASH
Integrated Silicon Solution
IS89C52 Datasheet PDF : 50 Pages
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IS89C52
ISSI
®
OSC
DIVIDE 12
C/T2 = 0
T2 PIN
C/T2 = 1
TRANSITION
DETECTOR
TL2
(8 BITS)
CONTROL
TR2
CAPTURE
TH2
(8 BITS)
RCAP2L RCAP2H
T2EX PIN
CONTROL
EXEN2
Figure 12. Timer 2 In Capture Mode
TF2
EXF2
TIMER 2
INTERRUPT
OSC
DIVIDE 12
T2 PIN
C/T2 = 0
C/T2 = 1
TRANSITION
DETECTOR
TL2
(8 BITS)
CONTROL
TR2
RELOAD
TH2
(8 BITS)
RCAP2L RCAP2H
T2EX PIN
CONTROL
EXEN2
TF2
EXF2
Figure 13. Timer 2 in Auto-Reload Mode
TIMER 1
OVERFLOW
TIMER 2
INTERRUPT
OSC
NOTE: OSC FREQ.
IS DIV BY 2, NOT 12
DIVIDE 2
C/T2 = 0
T2 PIN
C/T2 = 1
TRANSITION
DETECTOR
DIVIDE 2
"0" "1"
TL2
TH2
(8 BITS) (8 BITS)
"1" "0"
CONTROL
TR2
"1" "0"
RELOAD
RCAP2L RCAP2H
SMOD
RCLK
DIVIDE 16
TCLK
DIVIDE 16
RX CLOCK
TX CLOCK
T2EX PIN
EXF2
TIMER 2
INTERRUPT
CONTROL
EXEN2
Figure 14. Timer 2 in Baud Rate Generator Mode
Note:
T2EX can be used as an additional external interrupt.
18
Integrated Silicon Solution, Inc. — 1-800-379-4774
MC013-1C
11/21/98
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