© 2004 Microchip Technology Inc. DS70070B-page 23-9
Section 23. CAN
CAN Module
23
Register 23-8: CiRX1CON: Receive Buffer 1 Status and Control Register
Upper Byte:
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
bit 15 bit 8
Lower Byte:
R/C-0 U-0 U-0 U-0 R-0 R-0 R-0 R-0
RXFUL
— — — RXRTRRO FILHIT<2:0>
bit 7 bit 0
bit 15-8 Unimplemented: Read as ‘0’
bit 7 RXFUL: Receive Full Status bit
1 = Receive buffer contains a valid received message
0 = Receive buffer is open to receive a new message
Note: This bit is set by the CAN module and should be cleared by software after the buffer is read.
bit 6-4 Unimplemented: Read as ‘0’
bit 3 RXRTRRO: Received Remote Transfer Request bit (read only)
1 = Remote transfer request was received
0 = Remote transfer request not received
Note: This bit reflects the status of the last message loaded into Receive Buffer 1.
bit 2-0 FILHIT<2:0>: Indicates Which Acceptance Filter Enabled the Message Reception bits
101 = Acceptance filter 5 (RXF5)
100 = Acceptance filter 4 (RXF4)
011 = Acceptance filter 3 (RXF3)
010 = Acceptance filter 2 (RXF2)
001 = Acceptance filter 1 (RXF1) (Only possible when DBEN bit is set)
000 = Acceptance filter 0 (RXF0) (Only possible when DBEN bit is set)
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
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