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CHAPTER 41: CAN
5. Operation
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER
: CAN
FUJITSU SEMICONDUCTOR CONFIDENTIAL
82
Table 5-3 CAN Bit Time Parameters
Parameter
Range
Function
BRP
[1 to 32] Defines the time quantity tq.
Sync_Seg
1 tq
Fixed length. Synchronizes the bit time with the system clock.
Prop_Seg
[1 to 8] tq Compensates for physical delay time.
Phase_Seg1
[1 to 8] tq Guarantees identification of edge-phase errors prior to the sample point.
The bit time may be temporarily prolonged due to synchronization.
Phase_Seg2
[1 to 8] tq Guarantees identification of edge-phase errors subsequent to the sample point.
The bit time may be temporarily shortened due to synchronization.
SJW
[1 to 4] tq Defines the resynchronization jump width.
It will not be greater than either of the phase buffer segments.
The bit timing effected by the CAN controller is shown in the following.
Figure 5-5 Bit Timing Effected by the CAN Controller
1 bit time (BT)
Sample point
1 unit time
(tq)
Sync
_Seg
TEG1
TEG2
MB91520 Series
MN705-00010-1v0-E
1775