ST10F280_12 datasheet(150/239 Pages) STMICROELECTRONICS

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Serial channels

ST10F280

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Doc ID 8673 Rev. 3

Using the above equation, the maximum Baud rate can be calculated for any given clock

speed. Baud rate versus reload register value (SOBRS=0 and SOBRS=1) is described in

Table 28.

Note:

The deviation errors given in the Table 28 are rounded. To avoid deviation errors use a Baud

rate crystal (providing a multiple of the ASC0/SSC sampling frequency).

Table 28.

Commonly used baud rates by reload value and deviation errors

S0BRS = ‘0’, fCPU = 40MHz

S0BRS = ‘1’, fCPU = 40MHz

Baud rate

(Baud)

Deviation

error

Reload value

(hexa)

Baud rate

(Baud)

Deviation

error

Reload value

(hexa)

1 250 000

0.0% / 0.0%

0000 / 0000

833 333

0.0% / 0.0%

0000 / 0000

112 000

+1.5% /7.0%

000A / 000B

112 000

+6.3% /7.0%

0006 / 0007

56 000

+1.5% /3.0%

0015 / 0016

56 000

+6.3% /0.8%

000D / 000E

38 400

+1.7% /1.4%

001F / 0020

38 400

+3.3% /1.4%

0014 / 0015

19 200

+0.2% /1.4%

0040 / 0041

19 200

+0.9% /1.4%

002A / 002B

9 600

+0.2% /0.6%

0081 / 0082

9 600

+0.9% /0.2%

0055 / 0056

4 800

+0.2% /0.2%

0103 / 0104

4 800

+0.4% /0.2%

00AC / 00AD

2 400

+0.2% /0.0%

0207 / 0208

2 400

+0.1% /0.2%

015A / 015B

1 200

0.1% / 0.0%

0410 / 0411

1 200

+0.1% /0.1%

02B5 / 02B6

600

0.0% / 0.0%

0822 / 0823

600

+0.1% /0.0%

056B / 056C

300

0.0% / 0.0%

1045 / 1046

300

0.0% / 0.0%

0AD8 / 0AD9

153

0.0% / 0.0%

1FE8 / 1FE9

102

0.0% / 0.0%

1FE8 / 1FE9

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