ST10F280_12 datasheet(152/239 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 clock speed as

given in Table 29.

Note:

The deviation errors given in the Table 29 are rounded. To avoid deviation errors use a Baud

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

14.2

High speed synchronous serial channel (SSC)

The High-Speed Synchronous Serial Interface SSC provides flexible high-speed serial

communication between the ST10F280 and other microcontrollers, microprocessors or

external peripherals.

The SSC supports full-duplex and half-duplex synchronous communication. The serial clock

signal can be generated by the SSC itself (master mode) or be received from an external

master (slave mode). Data width, shift direction, clock polarity and phase are programmable.

This allows communication with SPI-compatible devices. Transmission and reception of data

is double-buffered. A 16-bit Baud rate generator provides the SSC with a separate serial

clock signal. The serial channel SSC has its own dedicated 16-bit Baud rate generator with

16-bit reload capability, allowing Baud rate generation independent from the timers.

Table 29.

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)

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

900

0.0% / 0.0%

15B2 / 15B3

600

0.0% / 0.0%

15B2 / 15B3

612

0.0% / 0.0%

1FE8 / 1FE9

407

0.0% / 0.0%

1FFD / 1FFE

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