HD64F2638F20J Datasheet, PDF (672/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 16 Controller Area Network (HCAN)
H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
16.2.3 Bit Configuration Register (BCR)
The bit configuration register (BCR) is a 16-bit readable/writable register that is used to set CAN
bit timing parameters and the baud rate prescaler.
BCR
Bit:
Initial value:
R/W:
15
BCR7
0
R/W
14
BCR6
0
R/W
13
BCR5
0
R/W
12
BCR4
0
R/W
11
BCR3
0
R/W
10
BCR2
0
R/W
9
BCR1
0
R/W
8
BCR0
0
R/W
Bit:
Initial value:
R/W:
7
BCR15
0
R/W
6
BCR14
0
R/W
5
BCR13
0
R/W
4
BCR12
0
R/W
3
BCR11
0
R/W
2
BCR10
0
R/W
1
BCR9
0
R/W
0
BCR8
0
R/W
Bits 15 and 14—Resynchronization Jump Width (SJW): These bits set the bit synchronization
range.
Bit 15:
BCR7
0
1
Bit 14:
BCR6
0
1
0
1
Description
Bit synchronization width = 1 time quantum
Bit synchronization width = 2 time quanta
Bit synchronization width = 3 time quanta
Bit synchronization width = 4 time quanta
(Initial value)
Bits 13 to 8—Baud Rate Prescaler (BRP): These bits are used to set the CAN bus baud rate.
Bit 13:
BCR5
0
0
0
⋅
⋅
⋅
1
Bit 12:
BCR4
0
0
0
⋅
⋅
⋅
1
Bit 11:
BCR3
0
0
0
⋅
⋅
⋅
1
Bit 10:
BCR2
0
0
0
⋅
⋅
⋅
1
Bit 9:
BCR1
0
0
1
⋅
⋅
⋅
1
Bit 8:
BCR0
0
1
0
⋅
⋅
⋅
1
Description
2 × system clock
4 × system clock
6 × system clock
⋅
⋅
⋅
128 × system clock
(Initial value)
Page 622 of 1458
REJ09B0103-0800 Rev. 8.00
May 28, 2010