Table of Contents
Advertisement
13
(1) SJW bits (D0-D1)
These bits set reSynchronization Jump Width.
(2) PH2 bits (D2-D4)
These bits set the width of Phase Segment2.
Note: The internal CAN module of the M32R/E has IPT (Information Processing Time) = 2.
Because PH2 bits = 0 after reset, be sure to change it to a value equal to or greater than 2
before you use the CAN module.
(3) PH1 bits (D5-D7)
These bits set the width of Phase Segment1.
(4) PRB bits (D8-D10)
These bits set the width of Propagation Segment.
(5) SAM bit (D11)
This bit sets the number of times each bit is sampled. When SAM = 0, the value sampled at the
end of Phase Segment1 is assumed to be the value of the bit. When SAM = 1, the value of the bit
is determined by a majority circuit from values sampled at three points-one sampled at the end of
Phase Segment1, one sampled before 1Tq, and one sampled before 2Tq.
Table 13.2.1 Typical Settings of Bit Timing when CPU Clock = 40 MHz
Baud Rate
BRP Set Value
1M bps
500Kbps
Tq Period (ns)
Tq's for 1 Bit
3
100
3
100
3
100
4
125
4
125
4
125
4
125
4
125
7
200
7
200
7
200
9
250
9
250
13-18
13.2 CAN Module Related Registers
PROP+PH1
PH2
10
7
2
10
6
3
10
5
4
8
5
2
8
4
3
16
13
2
16
12
3
16
11
4
10
7
2
10
6
3
10
5
4
8
5
2
8
4
3
CAN MODULE
Sampling Point
80%
70%
60%
75%
63%
88%
81%
75%
80%
70%
60%
75%
63%
Ver.0.10
Advertisement
Table of Contents
