Datasheet

dsPIC33EPXXXGM3XX/6XX/7XX
DS70000689D-page 316  2013-2014 Microchip Technology Inc.
21.4 CAN Message Buffers
CAN Message Buffers are part of RAM memory. They
are not CAN Special Function Registers. The user
application must directly write into the RAM area that is
configured for CAN Message Buffers. The location and
size of the buffer area is defined by the user
application.
BUFFER 21-1: CANx MESSAGE BUFFER WORD 0
U-0 U-0 U-0 R/W-x R/W-x R/W-x R/W-x R/W-x
— — — SID10 SID9 SID8 SID7 SID6
bit 15 bit 8
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
SID5 SID4 SID3 SID2 SID1 SID0 SRR IDE
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 15-13 Unimplemented: Read as ‘0’
bit 12-2 SID<10:0>: Standard Identifier bits
bit 1 SRR: Substitute Remote Request bit
When IDE =
0:
1 = Message will request remote transmission
0 = Normal message
When IDE =
1:
The SRR bit must be set to ‘1’.
bit 0 IDE: Extended Identifier bit
1 = Message will transmit an Extended Identifier
0 = Message will transmit a Standard Identifier
BUFFER 21-2: CANx MESSAGE BUFFER WORD 1
U-0 U-0 U-0 U-0 R/W-x R/W-x R/W-x R/W-x
— — — —EID<17:14>
bit 15 bit 8
R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x R/W-x
EID<13:6>
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 15-12 Unimplemented: Read as ‘0’
bit 11-0 EID<17:6>: Extended Identifier bits