Bit Configuration Register (Bcr) - Hitachi H8S/2628 Hardware Manual

15.3.3

Bit Configuration Register (BCR)

BCR is a 16-bit register that is used to set HCAN bit timing parameters and the baud rate
prescaler. For details on parameters, refer to section 15.4.2, Initialization after Hardware Reset.
Bit Bit Name
15 BCR7
14 BCR6
13 BCR5
12 BCR4
11 BCR3
10 BCR2
9 BCR1
8 BCR0
7 BCR15
6 BCR14
5 BCR13
4 BCR12
Initial Value R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
0 R/W
Description
Re-Synchronization Jump Width (SJW)
Set the maximum bit synchronization width.
00: 1 time quantum
01: 2 time quanta
10: 3 time quanta
11: 4 time quanta
Baud Rate Prescaler (BRP)
Set the length of time quanta.
000000: 2 × system clock
000001: 4 × system clock
000010: 6 × system clock
:
111111: 128 × system clock
Bit Sample Point (BSP)
Sets the point at which data is sampled.
0: Bit sampling at one point (end of time segment 1
(TSEG1))
1: Bit sampling at three points (end of TSEG1 and
preceding and following time quanta)
Time Segment 2 (TSEG2)
Set the TSEG2 width within a range of 2 to 8 time
quanta.
000: Setting prohibited
001: 2 time quanta
010: 3 time quanta
011: 4 time quanta
100: 5 time quanta
101: 6 time quanta
110: 7 time quanta
111: 8 time quanta
Rev. 1.0, 09/02, page 361 of 568