13-23
13
32180 Group User’s Manual (Rev.1.0)
13.2 CAN Module Related Registers
CAN MODULE
(1) SJW bits (Bits 0–1)
These bits set the reSynchronization Jump Width.
(2) PH2 bits (Bits 2–4)
These bits set the width of Phase Segment2.
(3) PH1 bits (Bits 5–7)
These bits set the width of Phase Segment1.
(4) PRB bits (Bits 8–10)
These bits set the width of Propagation Segment.
(5) SAM bit (Bit 11)
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 three sampled values, each sampled 2 Tq’s before, 1 Tq before, and at the end of
Phase Segment1.
Table 13.2.1 Typical Settings of Bit Timing when CPU Clock = 80 MHz
Baud Rate
BRP Set Value
Tq Period (ns)
No. of Tq’s in 1 Bit
PROP + PH1
PH2
Sampling Point
1M bps
1
50
20
13
6
70%
3
100
10
7
2
80%
3
100
10
6
3
70%
3
100
10
5
4
60%
4
125
8
5
2
75%
4
125
8
4
3
63%
500K bps
4
125
16
13
2
88%
4
125
16
12
3
81%
4
125
16
11
4
75%
7
200
10
7
2
80%
7
200
10
6
3
70%
7
200
10
5
4
60%
9
250
8
5
2
75%
9
250
8
4
3
63%
Table 13.2.2 Typical Settings of Bit Timing when CPU Clock = 64 MHz
Baud Rate
BRP Set Value
Tq Period (ns)
No. of Tq’s in 1 Bit
PROP + PH1
PH2
Sampling Point
1M bps
1
62.5
16
10
5
69%
3
125
8
5
2
75%
3
125
8
4
3
63%
500K bps
3
125
16
13
2
88%
3
125
16
11
4
75%
7
250
8
5
2
75%
7
250
8
4
3
63%
Summary of Contents for M32R/ECU Series
Page 17: ...12 This page is blank for reasons of layout...
Page 712: ...CHAPTER 18 OSCILLATOR CIRCUIT 18 1 Oscillator Circuit 18 2 Clock Generator Circuit...
Page 794: ...CHAPTER 22 TYPICAL CHARACTERISTICS...
Page 796: ...APPENDIX 1 MECHANICAL SPECIFICAITONS Appendix 1 1 Dimensional Outline Drawing...
Page 798: ...APPENDIX 2 INSTRUCTION PROCESSING TIME Appendix 2 1 32180 Instruction Processing Time...
Page 802: ...APPENDIX 3 PROCESSING OF UNUSED PINS Appendix 3 1 Example Processing of Unused Pins...
