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CHAPTER 19 FCAN CONTROLLER (V850/SC3)
User’s Manual U15109EJ3V0UD
659
Figure 19-33. Setting of CANn Synchronization Control Register (CnSYNC)
START
No
SAMP = 0
Set data bit time
(DBTR4 to DBTR0)
1 bit time = BTL
×
(m + 1)
m = 7 to 24 (set using bits DBTR4 to DBTR0)
Sample point = BTL
×
(m + 1)
m = 2 to 16 (set using bits SPTR4 to SPTR0)
Note
Set sample point
(SPTR4 to SPTR0)
Set SJW
(SJWR1, SJWR0)
SAMP = 1
Yes
Set once-only
(single shot) sampling
Set sampling for
one location only
Set sampling for
three locations
SJW = BTL
× (
m + 1)
m = 0 to 3 (set using bits SJWR1 and SJWR0)
Note
The setting of m = 2, 3 is reserved for setting sample point extension, and is not compliant with the
CAN protocol specifications.
Remarks 1.
BTL = 1/f
BTL
(f
BTL
= CAN protocol layer basic system clock)
2
. n = 1, 2