AN2645 datasheet(28/36 Pages) STMICROELECTRONICS

부품명	AN2645

상세설명	Migration and compatibility guidelines for STM8S microcontroller applications

PDF	36 Pages

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제조업체	STMICROELECTRONICS [STMicroelectronics]

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28 / 36 page

Block-by-block compatibility analysis

AN2645

28/36

3.5

Communication peripherals

3.5.1

SPI

This peripheral is present in all STM8S sub-families. The only difference is the maximum

communication speed:

●

8 Mbit/s (fMASTER/2) in Access line

●

10 Mbit/s in Performance line.

3.5.2

I2C

This peripheral is present in all STM8S sub-families. If true open drain lines are required,

you have to take this into account when selecting the I/O pins to use for I2C. In the default

mapping, the SDA & SCL alternate functions are generally mapped to pins with true open

drain capability. This is not the case when the SDA & SCL function are remapped to other

pins.

I/Os with true open drain capability are available for I2C in all STM8S with one important

exception mentioned in the note below.

Note:

STM8S105x 32-pin devices do not have true open drain I/Os available for I2C. The I/Os

where the I2C functions can be mapped are configurable as pseudo open drain only.

3.5.3

CAN

The CAN peripheral present only in the STM8S208x sub-family. When migrating within this

sub-family there are no compatibility concerns for this block.

AN2645 데이터시트(PDF) 28 Page - STMicroelectronics