7641 datasheet(192/385 Pages) RENESAS

192 / 385 page

Rev.2.00

Aug 28, 2006

page 61 of 148

7641 Group

REJ09B0336-0200

APPLICATION

2.4 UART

2.4.4 Transfer bit rate

UART1 and UART2 can use either internal clock

φ or SCSGCLK (Special Count Source Generator output)

as its clock.

(1) Setting examples using internal clock

φφφφφ

Table 2.4.1 shows setting examples of the baud rate generator (BRG) values and transfer bit rate values.

Table 2.4.1 Setting examples of baud rate generator values and transfer bit rate values (

φφφφφ = 12 MHz))

φ/1 (Note 1)

BRG setting Transfer

value

bit rate (bps)

00 (0016)

750,000.0

01 (0116)

375,000.0

02 (0216)

250,000.0

03 (0316)

187,500.0

04 (0416)

150,000.0

05 (0516)

125,000.0

06 (0616)

107,142.9

07 (0716)

93,750.0

08 (0816)

83,333.3

09 (0916)

75,000.0

10 (0A16)

68,181.8

11 (0B16)

65,250.0

12 (0C16)

57,692.3

13 (0D16)

53,571.4

14 (0E16)

50,000.0

15 (0F16)

46,875.0

φ/8 (Note 1)

BRG setting Transfer

value

bit rate (bps)

φ/32 (Note 1)

BRG setting Transfer

value

bit rate (bps)

φ/32 (Note 1)

BRG setting Transfer

value

bit rate (bps)

00 (0016)

93,750.0

01 (0116)

46,875.0

02 (0216)

31,250.0

03 (0316)

23,437.5

04 (0416)

18,750.0

05 (0516)

15,625.0

06 (0616)

13,392.8

07 (0716)

11,718.7

08 (0816)

10,416.6

09 (0916)

9,375.0

10 (0A16)

8,522.7

11 (0B16)

7,812.5

12 (0C16)

7,211.5

13 (0D16)

6,696.4

14 (0E16)

6,250.0

15 (0F16)

5,859.3

00 (0016)

23,437.5

01 (0116)

11,718.7

02 (0216)

7,812.5

03 (0316)

5,859.4

04 (0416)

4,687.5

05 (0516)

3,906.3

06 (0616)

3,348.2

07 (0716)

2,929.7

08 (0816)

2,604.2

09 (0916)

2,343.7

10 (0A16)

2,130.6

11 (0B16)

1,953.1

12 (0C16)

1,802.8

13 (0D16)

1,674.1

14 (0E16)

1,562.5

15 (0F16)

1,464.8

00 (0016)

2,929.7

01 (0116)

1,464.8

02 (0216)

976.6

03 (0316)

732.4

04 (0416)

585.9

05 (0516)

488.3

06 (0616)

418.5

07 (0716)

366.2

08 (0816)

325.5

09 (0916)

292.9

10 (0A16)

266.3

11 (0B16)

244.1

12 (0C16)

225.3

13 (0D16)

209.2

14 (0E16)

195.3

15 (0F16)

183.1

253 (FD16)

11.5

254 (FE16)

11.4

255 (FF16)

11.4

253 (FD16)

2,952.7

254 (FE16)

2,941.1

255 (FF16)

2,929.7

253 (FD16)

369.0

254 (FE16)

367.6

255 (FF16)

366.2

253 (FD16)

92.2

254 (FE16)

91.9

255 (FF16)

91.6

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