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PIC17C752-08/CL датащи(PDF) 110 Page - Microchip Technology

номер детали PIC17C752-08/CL
подробное описание детали  High-Performance 8-Bit CMOS EPROM Microcontrollers with 10-bit A/D
PDF  328 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC17C752-08/CL датащи(HTML) 110 Page - Microchip Technology

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PIC17C7XX
DS30289A-page 110
© 1998 Microchip Technology Inc.
13.2.2
FOUR CAPTURE MODE
This mode is selected by setting bit CA1/PR3. A block
diagram is shown in Figure 13-9. In this mode, TMR3
runs without a period register and increments from
0000h to FFFFh and rolls over to 0000h. The TMR3
interrupt Flag (TMR3IF) is set on this rollover. The
TMR3IF bit must be cleared in software.
Registers PR3H/CA1H and PR3L/CA1L make a 16-bit
capture register (Capture1). It captures events on pin
RB0/CAP1. Capture mode is configured by the
CA1ED1 and CA1ED0 bits. Capture1 Interrupt Flag bit
(CA1IF) is set upon detection of the capture event. The
corresponding interrupt mask bit is CA1IE. The
Capture1 Overflow Status bit is CA1OVF.
All the captures operate in the same manner. Refer to
Section 13.2.1 for the operation of capture.
FIGURE 13-9: TIMER3 WITH FOUR CAPTURES BLOCK DIAGRAM
RB0/CAP1
Edge Select,
Prescaler Select
PR3H/CA1H
PR3L/CA1L
RB1/CAP2
RG4/CAP3
Edge Select,
Prescaler Select
2
Set CA1IF
(PIR1<2>)
Capture1 Enable
TMR3ON
TMR3CS
(TCON1<2>)
0
1
Set TMR3IF
(PIR1<6>)
Edge Select,
Prescaler Select
CA2H
CA2L
Set CA2IF
(PIR1<3>)
CA3H
CA3L
Set CA3IF
(PIR2<2>)
CA1ED1, CA1ED0
(TCON1<5:4>)
(TCON2<2>)
Fosc/4
RB5/TCLK3
Capture2 Enable
Capture3 Enable
CA2ED1, CA2ED0
(TCON1<7:6>)
2
CA3ED1: CA3ED0
(TCON3<2:1>)
TMR3H
TMR3L
2
RE3/CAP4
Edge Select,
Prescaler Select
2
CA4H
CA4L
Set CA4IF
(PIR2<3>)
Capture4 Enable
CA4ED1: CA4ED0
(TCON3<4:3>)



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