MCP2515
REGISTER 4-5:
RXBnSIDL – RECEIVE BUFFER n STANDARD IDENTIFIER LOW
(ADDRESS: 62h, 72h)
R-x
R-x
R-x
R-x
R-x
IDE
U-0
—
R-x
R-x
SID2
SID1
SID0
SRR
EID17
EID16
bit 7
bit 0
bit 7-5
bit 4
SID: Standard Identifier bits <2:0>
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
bit 3
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
bit 2
Unimplemented: Reads as ‘0’
bit 1-0
EID: Extended Identifier bits <17:16>
These bits contain the two most significant bits of the Extended Identifier for the received
message
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
‘1’ = Bit is set
REGISTER 4-6:
RXBnEID8 – RECEIVE BUFFER n EXTENDED IDENTIFIER HIGH
(ADDRESS: 63h, 73h)
R-x
R-x
R-x
R-x
R-x
R-x
R-x
R-x
EID15
EID14
EID13
EID12
EID11
EID10
EID9
EID8
bit 7
bit 0
bit 7-0
EID: Extended Identifier bits <15:8>
These bits hold bits 15 through 8 of the Extended Identifier for the received message
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
‘1’ = Bit is set
DS21801D-page 30
Preliminary
© 2005 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
