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Section 20 Controller Area Network
R01UH0134EJ0400 Rev. 4.00 Page 1003 of 2108
Sep 24, 2014
SH7262 Group, SH7264 Group
CMAX, Repeat_Factor, and Offset are register values
Repeat_Factor
rep_factor = 3'b010
(Repeat_Factor = 4)
CMAX = 3'b100
(Cycle_Count_Max = 15)
CCR = 0
System Matrix
offset = 1
offset = 1
offset = 1
CCR = 1
CCR = 2
CCR = 3
CCR = 4
CCR = 5
CCR = 6
CCR = 7
CCR = 12
CCR = 13
CCR = 14
CCR = 15
Repeat_Factor
Figure 20.8 System Matrix
Tx-Trigger Times must be set in ascending order such that the difference between them satisfies
the following condition.
TTT(mailbox i) –1 TTT(mailbox i-1) > TEW + Maximum frame length + 9