Microchip Technology DM183021 Data Sheet
PIC18F2331/2431/4331/4431
DS39616D-page 104
2010 Microchip Technology Inc.
REGISTER 10-6:
PIR3: PERIPHERAL INTERRUPT REQUEST (FLAG) REGISTER 3
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
—
—
—
PTIF
IC3DRIF
IC2QEIF
IC1IF
TMR5IF
bit 7
bit 0
Legend:
R = Readable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-5
Unimplemented:
Read as ‘0’
bit 4
PTIF:
PWM Time Base Interrupt bit
1
= PWM time base matched the value in the PTPER registers. Interrupt is issued according to the
postscaler settings. PTIF must be cleared in software.
0
= PWM time base has not matched the value in the PTPER registers
bit 3
IC3DRIF:
IC3 Interrupt Flag/Direction Change Interrupt Flag bit
IC3 Enabled (CAP3CON<3:0>):
1
1
= TMR5 value was captured by the active edge on CAP3 input (must be cleared in software)
0
= TMR5 capture has not occurred
QEI Enabled (QEIM<2:0>):
1
1
= Direction of rotation has changed (must be cleared in software)
0
= Direction of rotation has not changed
bit 2
IC2QEIF:
IC2 Interrupt Flag/QEI Interrupt Flag bit
IC2 Enabled (CAP2CON<3:0>):
1
1
= TMR5 value was captured by the active edge on CAP2 input (must be cleared in software)
0
= TMR5 capture has not occurred
QEI Enabled (QEIM<2:0>):
1
1
= The QEI position counter has reached the MAXCNT value, or the index pulse, INDX, has been
detected. Depends on the QEI operating mode enabled. Must be cleared in software.
0
= The QEI position counter has not reached the MAXCNT value or the index pulse has not been
detected
bit 1
IC1 Enabled (CAP1CON<3:0>):
1
1
= TMR5 value was captured by the active edge on CAP1 input (must be cleared in software)
0
= TMR5 capture has not occurred
QEI Enabled (QEIM<2:0>), Velocity Measurement Mode Enabled (VELM = 0 in QEICON register):
1
1
= Timer5 value was captured by the active velocity edge (based on PHA or PHB input). CAP1REN
bit must be set in CAP1CON register. IC1IF must be cleared in software.
0
= Timer5 value was not captured by the active velocity edge
bit 0
TMR5IF:
Timer5 Interrupt Flag bit
1
= Timer5 time base matched the PR5 value (must be cleared in software)
0
= Timer5 time base did not match the PR5 value