Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 20 CAN CONTROLLER
R01UH0042EJ0500 Rev.5.00 Page 960 of 1513
Aug 12, 2011
(12) CAN0 module bit rate prescaler register (C0BRP)
The C0BRP register is used to select the CAN protocol layer base clock (fTQ). The communication baud rate is
set to the C0BTR register.
After reset: FFH R/W Address: 03FEC05AH
7 6 5 4 3 2 1 0
C0BRP TQPRS7 TQPRS6 TQPRS5 TQPRS4 TQPRS3 TQPRS2 TQPRS1 TQPRS0
TQPRS7 to TQPRS0 CAN protocol layer base system clock (fTQ)
0 fCANMOD/1
1 fCANMOD/2
n fCANMOD/(n + 1)
: :
255 fCANMOD/256 (default value)
Figure 20-23. CAN Module Clock
CCP 3 CCP2
Prescaler
CAN0 module bit-rate prescaler register (C0BRP)
CAN0 global clock selection register
(C0GMCS)
Baud rate generator
CAN0 bit-rate
register (C0BTR)
CCP1 CCP0
TQPRS0
f CAN
f CANMOD
f TQ
0
00
0
TQPRS1
TQPRS2
TQPRS3TQPRS4TQPRS5
TQPRS6TQPRS7
Remark f
CAN: CAN clock frequency
f
CANMOD: CAN module system clock frequency
f
TQ: CAN protocol layer base system clock frequency
Caution The C0BRP register can be write-accessed only in the initialization mode.