AN3139 datasheet(9/63 Pages) STMICROELECTRONICS

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AN3139

STM8L family compatibility

Doc ID 16993 Rev 3

9/63

1.2

Fully compatible blocks

The STM8L family embeds a set of system blocks which are by definition common to all

products. Those blocks are identical, so they have the same structure, registers and control

bits. There is no need to perform any software change to keep the same functionality at the

application level after migration. When external components are needed (e.g. Vcap

capacitor) no change is required from one product to another. All the features and behaviors

remain the same. These blocks are shown in Figure 1: STM8L family block diagram.

Fully compatible parts and peripherals are:

●

STM8 core

●

Debug / SWIM module

●

Power-on reset (POR)

●

Voltage regulator

●

Low speed internal RC (LSI)

●

High speed internal RC (HSI)

●

Independent watchdog

●

Timers (TIM2, TIM3 and TIM4)

●

IR (infrared interface)

1.3

Blocks that are compatible with minor exceptions

Some of the peripherals or functional blocks can have differences in their electrical

parameters, structure, registers, control bits or other minor aspects but not in their main

functionality.

SPI

SPI1

SPI1/SPI2

USART

USART1

USART1/USART2/USART3

LCD

Not available

Yes

AES

Not available

Yes(1)

Available on high-density STM8L16x devices only.

Table 1.

Overview of STM8L family peripherals (continued)

Peripheral

STM8L10x

STM8L15x/STM8L16x

Low density

STM8L10x

Low density

STM8L15x

Medium

density

STM8L15x

Medium+/High density STM8L15x/

High density STM8L16x

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