Datasheet

Table Of Contents
PIC18F1220/1320
DS39605F-page 82 © 2007 Microchip Technology Inc.
9.4 IPR Registers
The IPR registers contain the individual priority bits for
the peripheral interrupts. Due to the number of
peripheral interrupt sources, there are two Peripheral
Interrupt Priority registers (IPR1, IPR2). Using the
priority bits requires that the Interrupt Priority Enable
(IPEN) bit be set.
REGISTER 9-8: IPR1: PERIPHERAL INTERRUPT PRIORITY REGISTER 1
U-0 R/W-1 R/W-1 R/W-1 U-0 R/W-1 R/W-1 R/W-1
ADIP RCIP TXIP CCP1IP TMR2IP TMR1IP
bit 7 bit 0
bit 7 Unimplemented: Read as0
bit 6 ADIP: A/D Converter Interrupt Priority bit
1 =High priority
0 = Low priority
bit 5 RCIP: EUSART Receive Interrupt Priority bit
1 =High priority
0 = Low priority
bit 4 TXIP: EUSART Transmit Interrupt Priority bit
1 =High priority
0 = Low priority
bit 3 Unimplemented: Read as0
bit 2 CCP1IP: CCP1 Interrupt Priority bit
1 =High priority
0 = Low priority
bit 1 TMR2IP: TMR2 to PR2 Match Interrupt Priority bit
1 =High priority
0 = Low priority
bit 0 TMR1IP: TMR1 Overflow Interrupt Priority bit
1 =High priority
0 = Low priority
Legend:
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