Datasheet

MCP2502X/5X
DS21664D-page 10 © 2007 Microchip Technology Inc.
REGISTER 2-4: CNF2 - CAN CONFIGURATION REGISTER 2
REGISTER 2-5: CNF3 - CAN CONFIGURATION REGISTER 3
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
BTLMODE SAM PHSEG12 PHSEG11 PHSEG10 PRSEG2 PRSEG1 PRSEG0
bit 7 bit 0
bit 7 BTL MODE: Length determination of PHSEG2 bit
1 = Length of Phase_Seg2 determined by bits 2:0 of CNF3
0 = Length of Phase_Seg2 is the greater of Phase_Seg1 or IPT(2Tq)
bit 6 SAM: Sample of the CAN bus line 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 PHSEG12:PHSEG10: Phase Buffer Segment1 bits
111 = length = 8 x T
Q
-
-
-
000 =
length = 1 x TQ
bit 2-0 PRSEG2:PRSEG0: Propagation Time Segment bits
111 = length = 8 x TQ
-
-
-
000 =
length = 1 x TΘ
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
U-0 R/W-0 U-0 U-0 U-0 R/W-0 R/W-0 R/W-0
— WAKFIL — — — PHSEG22 PHSEG21 PHSEG20
bit 7 bit 0
bit 7 Unimplemented: (Reads as 0)
bit 6 WAKFIL: Wake-up filter bit
1 = Wake-up filter enabled
0 = Wake-up filter disabled
bit 5-3 Unimplemented: (Reads as 0)
bit 2-0 PHSEG22:PHSEG20: Phase Buffer Segment2 bits
111 =
length = 8 x TQ
-
-
-
001 =
length = 2 x TQ
000 = Invalid
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