PIC16F62X
10.0
CAPTURE/COMPARE/PWM
(CCP) MODULE
Additional information on the CCP module is available
in the PICmicro™ Mid-Range Reference Manual,
(DS33023).
The CCP (Capture/Compare/PWM) module contains a
16-bit register which can operate as a 16-bit capture
register, as a 16-bit compare register or as a PWM
master/slave Duty Cycle register.
shows the
timer resources of the CCP module modes.
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. All are readable and writable.
TABLE 10-1
CCP MODE - TIMER
RESOURCE
Timer Resource
Timer1
Timer1
Timer2
CCP Mode
Capture
Compare
PWM
REGISTER 10-1: CCP1CON REGISTER (ADDRESS 17h)
U-0
—
U-0
—
R/W-0
CCP1X
R/W-0
CCP1Y
R/W-0
CCP1M3
R/W-0
CCP1M2
R/W-0
CCP1M1
R/W-0
CCP1M0
bit7
bit0
R = Readable bit
W = Writable bit
U = Unimplemented bit, read
as ’0’
-n = Value at POR reset
bit 7-6:
Unimplemented:
Read as '0'
bit 5-4:
CCP1X:CCP1Y:
PWM Least Significant bits
Capture Mode: Unused
Compare Mode: Unused
PWM Mode: These bits are the two LSbs of the PWM duty cycle. The eight MSbs are found in CCPRxL.
bit 3-0:
CCP1M3:CCP1M0:
CCPx Mode Select bits
0000
= Capture/Compare/PWM off (resets CCP1 module)
0100
= Capture mode, every falling edge
0101
= Capture mode, every rising edge
0110
= Capture mode, every 4th rising edge
0111
= Capture mode, every 16th rising edge
1000
= Compare mode, set output on match (CCP1IF bit is set)
1001
= Compare mode, clear output on match (CCP1IF bit is set)
1010
= Compare mode, generate software interrupt on match (CCP1IF bit is set, CCP1 pin is unaffected)
1011
= Compare mode, trigger special event (CCP1IF bit is set; CCP1 resets TMR1
11xx
= PWM mode
©
1999 Microchip Technology Inc.
Preliminary
DS40300B-page 63
MICROCHIP [ MICROCHIP TECHNOLOGY ]
