MCP2515
REGISTER 5-1:
CNF1 – CONFIGURATION 1 (ADDRESS: 2Ah)
R/W-0
SJW1
R/W-0
SJW0
R/W-0
BRP5
R/W-0
BRP4
R/W-0
BRP3
R/W-0
BRP2
R/W-0
BRP1
R/W-0
BRP0
bit 7
bit 0
bit 7-6
bit 5-0
SJW: Synchronization Jump Width Length bits <1:0>
11= Length = 4 x TQ
10= Length = 3 x TQ
01= Length = 2 x TQ
00= Length = 1 x TQ
BRP: Baud Rate Prescaler bits <5:0>
TQ = 2 x (BRP + 1)/FOSC
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 5-2:
CNF2 – CONFIGURATION 1 (ADDRESS: 29h)
R/W-0
BTLMODE
bit 7
R/W-0
SAM
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
PHSEG12 PHSEG11 PHSEG10 PRSEG2 PRSEG1 PRSEG0
bit 0
bit 7
bit 6
BTLMODE: PS2 Bit Time Length bit
1= Length of PS2 determined by PHSEG22:PHSEG20 bits of CNF3
0= Length of PS2 is the greater of PS1 and IPT (2 TQ)
SAM: Sample Point Configuration bit
1= Bus line is sampled three times at the sample point
0= Bus line is sampled once at the sample point
bit 5-3
bit 2-0
PHSEG1: PS1 Length bits<2:0>
(PHSEG1 + 1) x TQ
PRSEG: Propagation Segment Length bits <2:0>
(PRSEG + 1) x TQ
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 42
Preliminary
© 2005 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
