PIC18LF2X_13 Datasheet, PDF (184/560 Pages) Microchip Technology – PIC18(L)F2X/45K50 USB Flash MCU Product Brief

PIC18(L)F2X/4XK22
14.2.4 SPECIAL EVENT TRIGGER
When Special Event Trigger mode is selected
(CCPxM<3:0> = 1011), and a match of the
TMRxH:TMRxL and the CCPRxH:CCPRxL registers
occurs, all CCPx and ECCPx modules will immediately:
• Set the CCP interrupt flag bit – CCPxIF
• CCP5 will start an ADC conversion, if the ADC is
enabled
On the next TimerX rising clock edge:
• A Reset of TimerX register pair occurs –
TMRxH:TMRxL = 0x0000,
This Special Event Trigger mode does not:
• Assert control over the CCPx or ECCPx pins.
• Set the TMRxIF interrupt bit when the
TMRxH:TMRxL register pair is reset. (TMRxIF
gets set on a TimerX overflow.)
If the value of the CCPRxH:CCPRxL registers are
modified when a match occurs, the user should be
aware that the automatic reset of TimerX occurs on the
next rising edge of the clock. Therefore, modifying the
CCPRxH:CCPRxL registers before this reset occurs
will allow the TimerX to continue without being reset,
inadvertently resulting in the next event being
advanced or delayed.
The Special Event Trigger mode allows the
CCPRxH:CCPRxL register pair to effectively provide a
16-bit programmable period register for TimerX.
14.2.5 COMPARE DURING SLEEP
The Compare mode is dependent upon the system
clock (FOSC) for proper operation. Since FOSC is shut
down during Sleep mode, the Compare mode will not
function properly during Sleep.
TABLE 14-5: REGISTERS ASSOCIATED WITH COMPARE
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
CCP1CON
CCP2CON
CCP3CON
CCP4CON
P1M<1:0>
P2M<1:0>
P3M<1:0>
—
—
DC1B<1:0>
DC2B<1:0>
DC3B<1:0>
DC4B<1:0>
CCP1M<3:0>
CCP2M<3:0>
CCP3M<3:0>
CCP4M<3:0>
CCP5CON
—
CCPR1H
CCPR1L
—
DC5B<1:0>
CCP5M<3:0>
Capture/Compare/PWM Register 1 High Byte (MSB)
Capture/Compare/PWM Register 1 Low Byte (LSB)
CCPR2H
CCPR2L
CCPR3H
CCPR3L
Capture/Compare/PWM Register 2 High Byte (MSB)
Capture/Compare/PWM Register 2 Low Byte (LSB)
Capture/Compare/PWM Register 3 High Byte (MSB)
Capture/Compare/PWM Register 3 Low Byte (LSB)
CCPR4H
CCPR4L
CCPR5H
CCPR5L
Capture/Compare/PWM Register 4 High Byte (MSB)
Capture/Compare/PWM Register 4 Low Byte (LSB)
Capture/Compare/PWM Register 5 High Byte (MSB)
Capture/Compare/PWM Register 5 Low Byte (LSB)
CCPTMRS0
CCPTMRS1
INTCON
C3TSEL<1:0>
—
—
GIE/GIEH PEIE/GIEL
—
—
TMR0IE
C2TSEL<1:0>
—
—
C5TSEL<1:0>
INT0IE
RBIE
TMR0IF
C1TSEL<1:0>
C4TSEL<1:0>
INT0IF
RBIF
Legend: — = Unimplemented location, read as ‘0’. Shaded bits are not used by Compare mode.
Note 1: These registers/bits are available on PIC18(L)F4XK22 devices.
Register
on Page
205
205
205
205
205
—
—
—
—
—
—
—
—
—
—
208
208
116
DS41412F-page 184
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