AN754 Ver la hoja de datos (PDF) - Microchip Technology
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AN754 Datasheet PDF : 13 Pages
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AN754
FIGURE 3: CAN BIT TIMING CONTROL REGISTERS (MCP2510 CNF REGISTERS)
CNF1
SJW.1 SJW.0 BRP.5 BRP.4 BRP.3 BRP.2 BRP.1
bit 7
SJW<1:0> (Synchronization Jump Width Length as measured in TQ):
11 = 4TQ
10 = 3TQ
01 = 2TQ
00 = 1TQ
BRP<5:0> (Baud Rate Prescaler TQ length as a multiple of tosc)
111111 = TQ = 2 x 64 x tOSC
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.
.
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.
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000010 = TQ = 2 x 3 x tOSC
000001 = TQ = 2 x 2 x tOSC
000000 = TQ = 2 x 1 x tOSC
BRP.0
bit 0
CNF2
CNF3
BTLMODE
bit 7
SAM
PS1.2
PS1.1
PS1.0
PRSEG.2 PRSEG.1 PRSEG.0
bit 0
BTLMODE (Determines how PS2 is calculated)
1 = PS2 is determined by CNF3.PS2<2:0>
0 = PS2 is the greater of PS1 and the Information Processing Time (IPT)
SAM (Configures the sample point as one sample or three samples
1 = Sample three times per bit
0 = Sample once per bit
PS1<2:0> (Configures Phase Segment 1)
111 = 8TQ
..
..
001 = 2TQ
000 = 1TQ
PRSEG<2:0> (Configures the Propagation Segment)
111 = 8TQ
..
..
001 = 2TQ
000 = 1TQ
---
WAKFIL
---
---
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bit 7
WAKFIL (Enables/Disables the wakeup filter)
1 = Filter enabled
0 = Filter disabled
PS2<2:0> (Configures Phase Segment 2)
111 = 8TQ
..
..
001 = 2TQ
000 = Not Valid (PS2MIN = IPT = 2TQ)
PHSEG22 PHSEG21 PHSEG20
bit 0
2001 Microchip Technology Inc.
DS00754A-page 3
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