MCP2515-I Datasheet, PDF (30/92 Pages) Microchip Technology – Stand-Alone CAN Controller with SPI Interface

MCP2515
REGISTER 4-5: RXBnSIDL – RECEIVE BUFFER n STANDARD IDENTIFIER LOW
(ADDRESS: 62h, 72h)
R-x
SID2
bit 7
R-x
R-x
R-x
R-x
SID1
SID0
SRR
IDE
U-0
R-x
—
EID17
R-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 7-5
bit 4
bit 3
bit 2
bit 1-0
SID<2:0>: Standard Identifier bits
These bits contain the three Least Significant bits of the Standard Identifier for the received message
SRR: Standard Frame Remote Transmit Request bit (valid only if IDE bit = ‘0’)
1 = Standard Frame Remote Transmit Request Received
0 = Standard Data Frame Received
IDE: Extended Identifier Flag bit
This bit indicates whether the received message was a Standard or an Extended Frame
1 = Received message was an Extended Frame
0 = Received message was a Standard Frame
Unimplemented: Reads as ‘0’
EID<17:16>: Extended Identifier bits
These bits contain the two Most Significant bits of the Extended Identifier for the received message
REGISTER 4-6: RXBnEID8 – RECEIVE BUFFER n EXTENDED IDENTIFIER HIGH
(ADDRESS: 63h, 73h)
R-x
EID15
bit 7
R-x
EID14
R-x
EID13
R-x
EID12
R-x
EID11
R-x
EID10
R-x
EID9
R-x
EID8
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 7-0
EID<15:8>: Extended Identifier bits
These bits hold bits 15 through 8 of the Extended Identifier for the received message
DS21801G-page 30
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