ST10F271Z1T3 datasheet(67/185 Pages) STMICROELECTRONICS

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ST10F271Z1

Serial channels

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Serial channels

Serial communication with other microcontrollers, microprocessors, terminals or external

peripheral components is provided by up to four serial interfaces: two asynchronous /

synchronous serial channels (ASC0 and ASC1) and two high-speed synchronous serial

channel (SSC0 and SSC1). Dedicated Baud rate generators set up all standard Baud rates

without the requirement of oscillator tuning. For transmission, reception and erroneous

reception, separate interrupt vectors are provided for ASC0 and SSC0 serial channel. A

more complex mechanism of interrupt sources multiplexing is implemented for ASC1 and

SSC1 (XBus mapped).

15.1

Asynchronous / synchronous serial interfaces

The asynchronous / synchronous serial interfaces (ASC0 and ASC1) provides serial

communication between the ST10F271Z1 and other microcontrollers, microprocessors or

external peripherals.

15.2

ASCx in asynchronous mode

In asynchronous mode, 8- or 9-bit data transfer, parity generation and the number of stop

bits can be selected. Parity framing and overrun error detection is provided to increase the

reliability of data transfers. Transmission and reception of data is double-buffered. Full-

duplex communication up to 2M Bauds (at 64 MHz of fCPU) is supported in this mode.

Table 40.

ASC asynchronous 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)

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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