Bit Configuration Register (Bcr) - Renesas H8S Series Hardware Manual

15.3.3

Bit Configuration Register (BCR)

The bit configuration register (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
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
Section 15 Controller Area Network (HCAN)
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 quantum.
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 one time quantum)
Rev. 6.00 Mar 15, 2006 page 391 of 570
REJ09B0211-0600