
2004 Microchip Technology Inc.
Preliminary
DS39625B-page 283
PIC18F2585/2680/4585/4680
REGISTER 23-6:
TXBnSIDH: TRANSMIT BUFFER n STANDARD IDENTIFIER REGISTERS,
HIGH BYTE [0
≤
n
≤
2]
R/W-x
R/W-x
R/W-x
R/W-x
SID10
SID9
SID8
SID7
bit 7
REGISTER 23-7:
TXBnSIDL: TRANSMIT BUFFER n STANDARD IDENTIFIER REGISTERS,
LOW BYTE [0
≤
n
≤
2]
R/W-x
R/W-x
R/W-x
U-0
SID2
SID1
SID0
—
bit 7
REGISTER 23-8:
TXBnEIDH: TRANSMIT BUFFER n EXTENDED IDENTIFIER REGISTERS,
HIGH BYTE [0
≤
n
≤
2]
R/W-x
R/W-x
R/W-x
R/W-x
EID15
EID14
EID13
EID12
bit 7
R/W-x
SID6
R/W-x
SID5
R/W-x
SID4
R/W-x
SID3
bit 0
bit 7-0
SID10:SID3:
Standard Identifier bits (if EXIDE (TXBnSIDL<3>) =
0
)
Extended Identifier bits EID28:EID21 (if EXIDE =
1
).
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
R/W-x
EXIDE
U-0
—
R/W-x
EID17
R/W-x
EID16
bit 0
bit 7-5
SID2:SID0:
Standard Identifier bits (if EXIDE (TXBnSIDL<3>) =
0
)
Extended Identifier bits EID20:EID18 (if EXIDE =
1
).
Unimplemented:
Read as ‘
0
’
EXIDE:
Extended Identifier Enable bit
1
= Message will transmit extended ID, SID10:SID0 become EID28:EID18
0
= Message will transmit standard ID, EID17:EID0 are ignored
Unimplemented:
Read as ‘
0
’
EID17:EID16:
Extended Identifier bits
bit 4
bit 3
bit 2
bit 1-0
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
R/W-x
EID11
R/W-x
EID10
R/W-x
EID9
R/W-x
EID8
bit 0
bit 7-0
EID15:EID8:
Extended Identifier bits (not used when transmitting standard identifier message)
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