PIC18F2480_09 Datasheet, PDF (321/490 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers with ECAN Technology, 10-Bit A/D and nanoWatt Technology

PIC18F2480/2580/4480/4580
24.2.6 CAN INTERRUPT REGISTERS
The registers in this section are the same as described
in Section 10.0 “Interrupts”. They are duplicated here
for convenience.
REGISTER 24-56: PIR3: PERIPHERAL INTERRUPT REQUEST (FLAG) REGISTER 3
Mode 0
R/W-0
IRXIF
R/W-0
WAKIF
R/W-0
ERRIF
R/W-0
R/W-0
R/W-0
TXB2IF TXB1IF⁽¹⁾ 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
R/W-0
R/W-0
TXBnIF TXB1IF⁽¹⁾ TXB0IF⁽¹⁾
R/W-0
RXBnIF
R/W-0
FIFOWMIF
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
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
Note 1:
IRXIF: CAN Bus Error Message Received 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 Module Error Interrupt Flag bit
1 = An error has occurred in the CAN module (multiple sources; refer to Section 24.15.6 “Error Interrupt”)
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
In CAN Mode 1 and 2, these bits are forced to ‘0’.
© 2009 Microchip Technology Inc.
DS39637D-page 321