2007 Microchip Technology Inc.
DS21291F-page 27
MCP2510
REGISTER 4-5:
RXBNSIDL - RECEIVE BUFFER N STANDARD IDENTIFIER LOW
(ADDRESS: 62h, 72h)
REGISTER 4-6:
RXBNEID8 - RECEIVE BUFFER N EXTENDED IDENTIFIER MID
(ADDRESS: 63h, 73h)
R-x
U-0
R-x
SID2
SID1
SID0
SRR
IDE
—EID17
EID16
bit 7
bit 0
bit 7-5
SID<2:0>: Standard Identifier Bits <2:0>
These bits contain the three least significant bits of the Standard Identifier for the received mes-
sage
bit 4
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
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<17:16>: Extended Identifier Bits <17:16>
These bits contain the two most significant bits of the Extended Identifier for the received mes-
sage
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
R-x
EID15
EID14
EID13
EID12
EID11
EID10
EID9
EID8
bit 7
bit 0
bit 7-0
EID<15:8>: Extended Identifier Bits <15:8>
These bits hold bits 15 through 8 of the Extended Identifier for the received message
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