ST10F272 datasheet(72/179 Pages) STMICROELECTRONICS

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Serial channels

ST10F272

72/179

Note:

The deviation errors given in the Table 42 and Table 43 are rounded. To avoid deviation

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

15.4

High speed synchronous serial interfaces

The High-Speed Synchronous Serial Interfaces (SSC0 and SSC1) provides flexible high-

speed serial communication between the ST10F272 and other microcontrollers,

microprocessors or external peripherals.

The SSCx supports full-duplex and half-duplex synchronous communication. The serial

clock signal can be generated by the SSCx 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 SSCx with a separate serial

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

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

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

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)

Table 43.

ASC synchronous 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)

8 000 000

0.0% / 0.0%

0000 / 0000

5 333 333

0.0% / 0.0%

0000 / 0000

112 000

+0.6% / -0.8%

0046 / 0047

112 000

+1.3% / -0.8%

002E / 002F

56 000

+0.6% / -0.1%

008D / 008E

56 000

+0.3% / -0.8%

005E / 005F

38 400

+0.2% / -0.3%

00CF / 00D0

38 400

+0.6% / -0.1%

0089 / 008A

19 200

+0.2% / -0.1%

019F / 01A0

19 200

+0.3% / -0.1%

0114 / 0115

9 600

+0.0% / -0.1%

0340 / 0341

9 600

+0.1% / -0.1%

022A / 022B

4 800

0.0% / 0.0%

0681 / 0682

4 800

0.0% / -0.1%

0456 / 0457

2 400

0.0% / 0.0%

0D04 / 0D05

2 400

0.0% / 0.0%

08AD / 08AE

1 200

0.0% / 0.0%

1A09 / 1A0A

1 200

0.0% / 0.0%

115B / 115C

977

0.0% / 0.0%

1FFB / 1FFC

900

0.0% / 0.0%

1724 / 1725

652

0.0% / 0.0%

1FF2 / 1FF3

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