
PIC18F2480/2580/4480/4580
DS39637A-page 120
Preliminary
2004 Microchip Technology Inc.
REGISTER 9-6:
PIR3: PERIPHERAL INTERRUPT REQUEST (FLAG) REGISTER 3
R/W-0
R/W-0
R/W-0
R/W-0
IRXIF
WAKIF
ERRIF
TXB2IF
Mode 0
R/W-0
TXB1IF
(1)
R/W-0
TXB0IF
(1)
R/W-0
RXB1IF
R/W-0
RXB0IF
Mode 1, 2
R/W-0
IRXIF
bit 7
R/W-0
WAKIF
R/W-0
ERRIF
R/W-0
TXBnIF
R/W-0
TXB1IF
(1)
R/W-0
TXB0IF
(1)
R/W-0
RXBnIF
R/W-0
FIFOWMIF
bit 0
bit 7
IRXIF:
CAN Invalid Received Message Interrupt Flag bit
1
= An invalid message has occurred on the CAN bus
0
= No invalid message on CAN bus
WAKIF:
CAN bus Activity Wake-up Interrupt Flag bit
1
= Activity on CAN bus has occurred
0
= No activity on CAN bus
ERRIF:
CAN bus Error Interrupt Flag bit
1
= An error has occurred in the CAN module (multiple sources)
0
= No CAN module errors
When CAN is in Mode 0:
TXB2IF:
CAN Transmit Buffer 2 Interrupt Flag bit
1
= Transmit Buffer 2 has completed transmission of a message and may be reloaded
0
= Transmit Buffer 2 has not completed transmission of a message
When CAN is in Mode 1 or 2:
TXBnIF:
Any Transmit Buffer Interrupt Flag bit
1
= One or more transmit buffers have completed transmission of a message and may be
reloaded
0
= No transmit buffer is ready for reload
TXB1IF:
CAN Transmit Buffer 1 Interrupt Flag bit
(1)
1
= Transmit Buffer 1 has completed transmission of a message and may be reloaded
0
= Transmit Buffer 1 has not completed transmission of a message
TXB0IF:
CAN Transmit Buffer 0 Interrupt Flag bit
(1)
1
= Transmit Buffer 0 has completed transmission of a message and may be reloaded
0
= Transmit Buffer 0 has not completed transmission of a message
When CAN is in Mode 0:
RXB1IF:
CAN Receive Buffer 1 Interrupt Flag bit
1
= Receive Buffer 1 has received a new message
0
= Receive Buffer 1 has not received a new message
When CAN is in Mode 1 or 2:
RXBnIF:
Any Receive Buffer Interrupt Flag bit
1
= One or more receive buffers has received a new message
0
= No receive buffer has received a new message
When CAN is in Mode 0:
RXB0IF:
CAN Receive Buffer 0 Interrupt Flag bit
1
= Receive Buffer 0 has received a new message
0
= Receive Buffer 0 has not received a new message
When CAN is in Mode 1:
Unimplemented:
Read as ‘
0
’
When CAN is in Mode 2:
FIFOWMIF:
FIFO Watermark Interrupt Flag bit
1
= FIFO high watermark is reached
0
= FIFO high watermark is not reached
Note 1:
In CAN Mode 1 and 2, this bit is forced to ‘
0
’.
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown