PIC18F23K20-ESLASHML datasheet(116/456 Pages) MICROCHIP

116 / 456 page

PIC18F2XK20/4XK20

DS41303G-page 116

 2010 Microchip Technology Inc.

9.7

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 and IPR2). Using the priority bits

requires that the Interrupt Priority Enable (IPEN) bit be

set.

IPR1: PERIPHERAL INTERRUPT PRIORITY REGISTER 1

R/W-1

PSPIP(1)

ADIP

RCIP

TXIP

SSPIP

CCP1IP

TMR2IP

TMR1IP

bit 7

bit 0

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

bit 7

PSPIP: Parallel Slave Port Read/Write Interrupt Priority bit(1)

= High priority

= Low priority

bit 6

ADIP: A/D Converter Interrupt Priority bit

= High priority

= Low priority

bit 5

RCIP: EUSART Receive Interrupt Priority bit

= High priority

= Low priority

bit 4

TXIP: EUSART Transmit Interrupt Priority bit

= High priority

= Low priority

bit 3

SSPIP: Master Synchronous Serial Port Interrupt Priority bit

= High priority

= Low priority

bit 2

CCP1IP: CCP1 Interrupt Priority bit

= High priority

= Low priority

bit 1

TMR2IP: TMR2 to PR2 Match Interrupt Priority bit

= High priority

= Low priority

bit 0

TMR1IP: TMR1 Overflow Interrupt Priority bit

= High priority

= Low priority

Note 1: The PSPIF bit is unimplemented on 28-pin devices and will read as ‘0’.

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