M16CSLASH29 datasheet(328/499 Pages) RENESAS

328 / 499 page

17. CAN Module

page 304

17.3.2 Bit-rate

Bit-rate depends on f1, the division value of the CAN module system clock, the division value of the baud

rate prescaler, and the number of Tq of one bit.

Table 17.2

shows the examples of bit-rate.

Table 17.2 Examples of Bit-rate

Calculation of Bit-rate

2 ✕ “fCAN division value (Note 1)” ✕ “baud rate prescaler division value (Note 2)” ✕ “number of Tq of one bit”

Note 1: fCAN division value = 1, 2, 4, 8, 16

fCAN division value: a value selected in the CCLKR register

Note 2: Baud rate prescaler division value = P + 1 (P: 0 to 15)

P: a value selected in the BRP bit in the C0CONR register

NOTE:

1. The number in ( ) indicates a value of “fCAN division value” multiplied by “baud rate prescaler division value”.

Bit-rate

20MHz

16MHz

10MHz

8MHz

1Mbps

10Tq (1)

8Tq (1)

500kbps

10Tq (2)

8Tq (2)

10Tq (1)

8Tq (1)

20Tq (1)

16Tq (1)

125kbps

10Tq (8)

8Tq (8)

10Tq (4)

8Tq (4)

20Tq (4)

16Tq (4)

20Tq (2)

16Tq (2)

83.3kbps

10Tq (12)

8Tq (12)

10Tq (6)

8Tq (6)

20Tq (6)

16Tq (6)

20Tq (3)

16Tq (3)

33.3kbps

10Tq (30)

8Tq (30)

10Tq (15)

8Tq (15)

20Tq (15)

16Tq (15)

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