AN3139 datasheet(53/63 Pages) STMICROELECTRONICS

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AN3139

Block-by-block compatibility analysis

Doc ID 16993 Rev 3

53/63

3.13.5

Stack

The space for the stack is always located at the end of the RAM memory. So its position in

the address space varies depending on the RAM memory size. The stack pointer value is

initialized to the upper address at reset and it is decremented each time a byte is pushed

onto the stack. The stack size is 513 bytes in all STM8L devices.

3.14

Interrupt mapping

The interrupt vector mapping is compatible for STM8L10x and STM8L15x/STM8L16x sub-

families except:

●

The new added vectors to support the new peripherals in the STM8L15x/STM8L16x

devices

●

The TIM1, TIM5, SPI1, SPI2, DAC, SPI2, USART2, USART3 and AES interrupts which

are not supported in the STM8L10x sub-family.

●

The timer 4 trigger interrupt which is not supported in the STM8L10x sub-family.

●

The auto-wakeup interrupt in the STM8L10x sub-family that is replaced by the RTC

interrupt in the STM8L15x/STM8L16x sub-family.

The following table lists these differences between all sub-families.

Table 20.

STM8L interrupt vector differences

STM8L10x

STM8L15x/STM8L16x

Low density

STM8L10x

Low density

STM8L15x

Medium density

STM8L15x

Medium+/High density

STM8L15x/ High density

STM8L16x

DMA1_CHANNEL0_1

DMA1_CHANNEL2_3

AWU interrupt

RTC

External interrupt port E?

PVD interrupt

EXTI port E/F PVD

External interrupt port G

External interrupt port H

LCD

System clock switch/?

CSS interrupt

System clock switch/CSS

interrupt/TIM1 break/DAC

System clock switch/CSS

interrupt/TIM1 break/DAC

ADC1

USART2 Tx interrupt

USART2 Rx interrupt

USART3 Tx interrupt

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