AN2645 datasheet(12/36 Pages) STMICROELECTRONICS

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Block-by-block compatibility analysis

AN2645

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Block-by-block compatibility analysis

3.1

Package pinout

Migration within the STM8S implies small changes in the pin layout and related changes in

the device functionality. The migration requirements are analyzed here under two main

aspects, depending on whether the migration is horizontal or vertical in Table 2: Overview of

packages in each sub-family.

●

Vertical moves are described in Section 3.1.1 and represent migration from one sub-

family to another. No package change is assumed at this point.

●

Horizontal moves are detailed in Section 3.1.2 which covers migration between

different packages inside the same sub-family.

The same syntax as in the STM8S datasheets is used here:

pin name (pin type) / alternate functions [optional functions]

Functions affected by migration are printed in bold.

Special groups of pins like power supply, alternate and optional outputs or system pins are

discussed separately.

See also Figure 2: STM8S pinout compatibility guide from 80-pin to 20-pin packages on

page 19.

Table 2.

Overview of packages in each sub-family

Pin-count

80-pin

(xxxM)

64-pin

(xxxR)

48-pin

(xxxC)

44-pin

(xxxS)

32-pin

(xxxK)

20-pin

(xxxF)

STM8S208x

LQFP

STM8S207x

LQFP

STM8S105x

LQFP

VFQFN

STM8S103x

LQFP

VFQFN

TSSOP

WFQFPN

STM8S903x

LQFP

VFQFPN

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