70353C Datasheet, PDF (14/76 Pages) Microchip Technology – Section 21. Enhanced Controller Area Network

dsPIC33E/PIC24E Family Reference Manual
Register 21-5:
R/W-x
bit 15
CiRXFnEID: ECAN Acceptance Filter Extended Identifier Register n (n = 0-15)
R/W-x
R/W-x
R/W-x
R/W-x
EID<15:8>
R/W-x
R/W-x
R/W-x
bit 8
R/W-x
bit 7
R/W-x
R/W-x
R/W-x
R/W-x
EID<7:0>
R/W-x
R/W-x
R/W-x
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 15-0
EID<15:0>: Extended Identifier bits
1 = Message address bit, EIDx, must be ‘1’ to match filter
0 = Message address bit, EIDx, must be ‘0’ to match filter
Register 21-6:
R/W-x
SID10
bit 15
CiRXMnSID: ECAN Acceptance Filter Mask Standard Identifier Register n (n = 0-2)
R/W-x
SID9
R/W-x
SID8
R/W-x
SID7
R/W-x
SID6
R/W-x
SID5
R/W-x
SID4
R/W-x
SID3
bit 8
R/W-x
R/W-x
R/W-x
U-0
R/W-x
U-0
SID2
SID1
SID0
—
MIDE
—
bit 7
R/W-x
EID17
R/W-x
EID16
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 15-5
bit 4
bit 3
bit 2
bit 1-0
SID<10:0>: Standard Identifier bits
1 = Include bit, SIDx, in filter comparison
0 = Bit, SIDx, is a “don’t care” in filter comparison
Unimplemented: Read as ‘0’
MIDE: Identifier Receive Mode bit
1 = Match only message types (standard or extended address) that correspond to EXIDE bit in filter
0 = Match either standard or extended address message if filters match
(that is, if (Filter SID) = (Message SID), or if (Filter SID/EID) = (Message SID/EID))
Unimplemented: Read as ‘0’
EID<17:16>: Extended Identifier bits
1 = Include bit, EIDx, in filter comparison
0 = Bit, EIDx, is a don’t care in filter comparison
DS70353C-page 21-14
© 2008-2011 Microchip Technology Inc.