Renesas 16-bit single-chip microcomputer Manual De Usuario

Rev.1.02    Jul 01, 2005    page 214 of 314
REJ09B0126-0102

M16C/6N Group (M16C/6NL, M16C/6NN)

18. CAN Module

This document is under development and its contents are subject to change.

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 18.2 shows the examples of bit-rate.

Calculation of Bit-rate

f1

2 

✕ “fCAN division value 

(1)

” 

✕ “baud rate prescaler division value 

(2)

” 

✕ “number of Tq of one bit”

NOTES:

1. fCAN division value = 1, 2, 4, 8, 16

fCAN division value: a value selected in the CCLKR register

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

24MHz

20MHz

16MHz

10MHz

8MHz

1Mbps

12Tq (1)

10Tq (1)

  8Tq (1)

-

-

500kbps

12Tq (2)

10Tq (2)

  8Tq (2)

10Tq (1)

  8Tq (1)

24Tq (1)

20Tq (1)

16Tq (1)

-

-

125kbps

12Tq (8)

10Tq (8)

  8Tq (8)

10Tq (4)

  8Tq (4)

16Tq (6)

20Tq (4)

16Tq (4)

20Tq (2)

16Tq (2)

24Tq (4)

-

-

-

-

83.3kbps

12Tq (12)

10Tq (12)

   8Tq (12)

10Tq (6)

  8Tq (6)

16Tq (9)

20Tq (6)

16Tq (6)

20Tq (3)

16Tq (3)

24Tq (6)

-

-

-

-

33.3kbps

12Tq (30)

10Tq (30)

   8Tq (30)

  10Tq (15)

   8Tq (15)

24Tq (15)

20Tq (15)

 16Tq (15)

-

-