Microchip Technology DM164134 数据表
PIC18FXX8
DS41159E-page 212
© 2006 Microchip Technology Inc.
REGISTER 19-14: RXBnSIDH: RECEIVE BUFFER n STANDARD IDENTIFIER,
HIGH BYTE REGISTERS
REGISTER 19-15: RXBnSIDL: RECEIVE BUFFER n STANDARD IDENTIFIER,
LOW BYTE REGISTERS
REGISTER 19-16: RXBnEIDH: RECEIVE BUFFER n EXTENDED IDENTIFIER,
HIGH BYTE REGISTERS
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
SID10
SID9
SID8
SID7
SID6
SID5
SID4
SID3
bit 7
bit 0
bit 7-0
SID10:SID3: Standard Identifier bits if EXID = 0 (RXBnSIDL Register) or
Extended Identifier bits EID28:EID21 if EXID = 1
Extended Identifier bits EID28:EID21 if EXID = 1
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/W-x
R/W-x
R/W-x
R/W-x
R/W-x
U-0
R/W-x
R/W-x
SID2
SID1
SID0
SRR
EXID
—
EID17
EID16
bit 7
bit 0
bit 7-5
SID2:SID0: Standard Identifier bits if EXID = 0 or
Extended Identifier bits EID20:EID18 if EXID = 1
Extended Identifier bits EID20:EID18 if EXID = 1
bit 4
SRR: Substitute Remote Request bit
This bit is always ‘0’ when EXID = 1 or equal to the value of RXRTRRO (RXnBCON<3>)
when EXID = 0.
when EXID = 0.
bit 3
EXID: Extended Identifier bit
1
= Received message is an extended data frame, SID10:SID0 are EID28:EID18
0
= Received message is a standard data frame
bit 2
Unimplemented: Read as ‘0’
bit 1-0
EID17:EID16: Extended Identifier bits
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/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
R/W-x
EID15
EID14
EID13
EID12
EID11
EID10
EID9
EID8
bit 7
bit 0
bit 7-0
EID15:EID8: Extended Identifier bits
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