Microchip Technology MA180025 データシート

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PIC18F87J90 FAMILY
DS39933D-page 112
 2010 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 three Peripheral
Interrupt Priority registers (IPR1, IPR2, IPR3). Using
the priority bits requires that the Interrupt Priority
Enable (IPEN) bit be set. 
     
REGISTER 9-10:
IPR1: PERIPHERAL INTERRUPT PRIORITY REGISTER 1
U-0
R/W-1
R/W-1
R/W-1
R/W-1
U-0
R/W-1
R/W-1
ADIP
RC1IP
TX1IP
SSPIP
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
Unimplemented: Read as ‘0’ 
bit 6
ADIP: A/D Converter Interrupt Priority bit
1
  = High  priority 
0
 = Low priority 
bit 5
RC1IP: EUSART Receive Interrupt Priority bit 
1
  = High  priority 
0
 = Low priority 
bit 4
TX1IP: EUSART Transmit Interrupt Priority bit 
1
  = High  priority 
0
 = Low priority
bit 3
SSPIP: Master Synchronous Serial Port Interrupt Priority bit 
1
  = High  priority 
0
 = Low priority
bit 2
Unimplemented: Read as ‘0’ 
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