ST10F271 datasheet(69/173 Pages) STMICROELECTRONICS

69 / 173 page

ST10F271

Serial channels

69/173

Note:

The deviation errors given in the Table 40 and Table 41 are rounded. To avoid deviation

errors use a Baud rate crystal (providing a multiple of the ASC0 sampling frequency).

15.3

ASCx in synchronous mode

In synchronous mode, data is transmitted or received synchronously to a shift clock which is

generated by the ST10F271. Half-duplex communication up to 8M Baud (at 40 MHz of fCPU)

is possible in this mode.

Table 41.

ASC asynchronous baud rates by reload value and deviation errors (fCPU = 64 MHz)

S0BRS = ‘0’, fCPU = 64 MHz

S0BRS = ‘1’, fCPU = 64 MHz

Baud Rate (Baud) Deviation Error

Reload Value

(hex)

Baud Rate (Baud) Deviation Error

Reload Value

(hex)

2 000 000

0.0% / 0.0%

0000 / 0000

1 333 333

0.0% / 0.0%

0000 / 0000

112 000

+1.5% / -7.0%

0010 / 0011

112 000

+6.3% / -7.0%

000A / 000B

56 000

+1.5% / -3.0%

0022 / 0023

56 000

+6.3% / -0.8%

0016 / 0017

38 400

+1.7% / -1.4%

0033 / 0034

38 400

+3.3% / -1.4%

0021 / 0022

19 200

+0.2% / -1.4%

0067 / 0068

19 200

+0.9% / -1.4%

0044 / 0045

9 600

+0.2% / -0.6%

00CF / 00D0

9 600

+0.9% / -0.2%

0089 / 008A

4 800

+0.2% / -0.2%

019F / 01A0

4 800

+0.4% / -0.2%

0114 / 0115

2 400

+0.2% / 0.0%

0340 / 0341

2 400

+0.1% / -0.2%

022A / 015B

1 200

0.1% / 0.0%

0681 / 0682

1 200

+0.1% / -0.1%

0456 / 0457

600

0.0% / 0.0%

0D04 / 0D05

600

+0.1% / 0.0%

08AD / 08AE

300

0.0% / 0.0%

1A09 / 1A0A

300

0.0% / 0.0%

115B / 115C

245

0.0% / 0.0%

1FE2 / 1FE3

163

0.0% / 0.0%

1FF2 / 1FF3

Table 42.

ASC synchronous baud rates by reload value and deviation errors (fCPU = 40 MHz)

S0BRS = ‘0’, fCPU = 40 MHz

S0BRS = ‘1’, fCPU = 40 MHz

Baud Rate (Baud) Deviation Error

Reload Value

(hex)

Baud Rate (Baud) Deviation Error

Reload Value

(hex)

5 000 000

0.0% / 0.0%

0000 / 0000

3 333 333

0.0% / 0.0%

0000 / 0000

112 000

+1.5% / -0.8%

002B / 002C

112 000

+2.6% / -0.8%

001C / 001D

56 000

+0.3% / -0.8%

0058 / 0059

56 000

+0.9% / -0.8%

003A / 003B

38 400

+0.2% / -0.6%

0081 / 0082

38 400

+0.9% / -0.2%

0055 / 0056

19 200

+0.2% / -0.2%

0103 / 0104

19 200

+0.4% / -0.2%

00AC / 00AD

9 600

+0.2% / 0.0%

0207 / 0208

9 600

+0.1% / -0.2%

015A / 015B

4 800

+0.1% / 0.0%

0410 / 0411

4 800

+0.1% / -0.1%

02B5 / 02B6

2 400

0.0% / 0.0%

0822 / 0823

2 400

+0.1% / 0.0%

056B / 056C

1 200

0.0% / 0.0%

1045 / 1046

1 200

0.0% / 0.0%

0AD8 / 0AD9

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