AN3139 datasheet(13/63 Pages) STMICROELECTRONICS

13 / 63 page

AN3139

STM8L family compatibility

Doc ID 16993 Rev 3

13/63

Figure 2.

STM8L10x code example

Figure 3.

STM8L15x code example

All parameters are identical, and the procedure is similar with two function calls for both con-

figuration and startup.

The main difference is the additional peripherals of the same type that are added in the

STM8L15x sub-family:

●

when migrating from STM8L10x sub-family to STM8L15x sub-family, the additional

peripheral must be added in every firmware library function as the first parameter (refer

to Figure 3)

●

when migrating from STM8L15x sub-family to STM8L10x sub-family, the additional

peripheral given as the first parameter in every firmware library function must be

removed (refer to Figure 2)

Another difference in the SPI peripheral is the CRC capability which is supported only in the

STM8L15x devices. In the above example (Figure 3.), the CRC polynomial “0x07” is explic-

itly defined. This CRC polynomial parameter must be removed from the “init” function in the

case of a migration from the STM8L15x sub-family to the STM8L10x sub-family.

The following table shows an overview of the firmware library compatibility between the two

sub-families STM8L10x and STM8L15x/STM8L16x and between the different peripherals of

the STM8L15x/STM8L16x sub-family. It describes the differences in terms of:

New features like the IrDA, Smartcard, Halfduplex and DAC dual channel features

Common features but with different implementations, like the comparator and CLK

initialization.

AN3139 Datasheet(PDF) 13 Page - STMicroelectronics