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2005 Microchip Technology Inc.
Preliminary
DS41265A-page 183
PIC16F946
15.0
CAPTURE/COMPARE/PWM
MODULES
Each Capture/Compare/PWM (CCP) module contains
a 16-bit register which can operate as a:
16-bit Capture register
16-bit Compare register
PWM Master/Slave Duty Cycle register
Both the CCP1 and CCP2 modules are identical in
operation, with the exception being the operation of the
special event trigger. Table 15-1 and Table 15-2 show
the resources and interactions of the CCP module(s).
In the following sections, the operation of a CCP
module is described with respect to CCP1. CCP2
operates the same as CCP1, except where noted.
CCP1 Module:
Capture/Compare/PWM Register1 (CCPR1) is com-
prised of two 8-bit registers: CCPR1L (low byte) and
CCPR1H (high byte). The CCP1CON register controls
the operation of CCP1. The special event trigger is
generated by a compare match and will reset Timer1.
CCP2 Module:
Capture/Compare/PWM Register2 (CCPR2) is com-
prised of two 8-bit registers: CCPR2L (low byte) and
CCPR2H (high byte). The CCP2CON register controls
the operation of CCP2. The special event trigger is
generated by a compare match and will reset Timer1
and start an A/D conversion (if the A/D module is
enabled).
Additional information on CCP modules is available in
the “PICmicro Mid-Range MCU Family Reference
Manual” (DS33023) and in Application Note AN594,
“Using the CCP Modules” (DS00594).
TABLE 15-1:
CCP MODE – TIMER
RESOURCES REQUIRED
TABLE 15-2:
INTERACTION OF TWO CCP MODULES
CCP Mode
Timer Resource
Capture
Timer1
Compare
Timer1
PWM
Timer2
CCPx Mode CCPy Mode
Interaction
Capture
Same TMR1 time base
Capture
Compare
The compare should be configured for the special event trigger, which clears TMR1
Compare
The compare(s) should be configured for the special event trigger, which clears TMR1
PWM
The PWMs will have the same frequency and update rate (TMR2 interrupt)
PWM
Capture
None
PWM
Compare
None
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相关PDF资料
2-1546217-0 TERM BLK RCPT 20POS SIDE 5.08MM
1-1546217-9 TERM BLK RCPT 19POS SIDE 5.08MM
1-1546217-8 TERM BLK RCPT 18POS SIDE 5.08MM
1-1546217-7 TERM BLK RCPT 17POS SIDE 5.08MM
1-1546217-6 TERM BLK RCPT 16POS SIDE 5.08MM
1-1546217-5 TERM BLK RCPT 15POS SIDE 5.08MM
1-1546217-4 TERM BLK RCPT 14POS SIDE 5.08MM
1-1546217-3 TERM BLK RCPT 13POS SIDE 5.08MM
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