32186 datasheet(642/1032 Pages) RENESAS

642 / 1032 page

CAN MODULE

13-32

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

13.2.4 CAN Configuration Registers

CAN0 Configuration Register (CAN0CONF)

<Address: H'0080 1006>

CAN1 Configuration Register (CAN1CONF)

<Address: H'0080 1406>

b15

SAM

PRB

PH1

PH2

SJW

000000000000

Bit Name

Function

0–1

SJW

00: SJW = 1Tq

reSynchronization Jump Width setting bit

01: SJW = 2Tq

10: SJW = 3Tq

11: SJW = 4Tq

2–4

PH2

000: Phase Segment2 = 1Tq

Phase Segment2 setting bit

001: Phase Segment2 = 2Tq

010: Phase Segment2 = 3Tq

011: Phase Segment2 = 4Tq

100: Phase Segment2 = 5Tq

101: Phase Segment2 = 6Tq

110: Phase Segment2 = 7Tq

111: Phase Segment2 = 8Tq

5–7

PH1

000: Phase Segment1 = 1Tq

Phase Segment1 setting bit

001: Phase Segment1 = 2Tq

010: Phase Segment1 = 3Tq

011: Phase Segment1 = 4Tq

100: Phase Segment1 = 5Tq

101: Phase Segment1 = 6Tq

110: Phase Segment1 = 7Tq

111: Phase Segment1 = 8Tq

8–10

PRB

000: Propagation Segment = 1Tq

Propagation Segment setting bit

001: Propagation Segment = 2Tq

010: Propagation Segment = 3Tq

011: Propagation Segment = 4Tq

100: Propagation Segment = 5Tq

101: Propagation Segment = 6Tq

110: Propagation Segment = 7Tq

111: Propagation Segment = 8Tq

SAM

0: Sampled one time

Sampling count select bit

1: Sampled three times

12–15

No function assigned. Fix to "0."

Notes: • Do not change settings of the CAN Configuration Register (CAN0CONF or CAN1CONF) during CAN operation (CAN Status

• Bit configuration is specified by the CAN protocol specification in such a way that it satisfies the conditions given below:

• Number of Tq’s for one bit: 8–25 Tq’s

• SJW

≤ min (Phase Segment1, Phase Segment2)

• Phase Segment2 = max (Phase Segment1, IPT*) where IPT = 1 for the internal CAN modules of the 32185/32186

min() is the function that returns the smaller of two values; max() is the function that returns the maximum value.

*IPT is an abbreviation for Information Processing Time, which is the time immediately after the sampling point.

13.2 CAN Module Related Registers

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