Contents

STM8AL3xxx STM8L052R8 STM8L1xxx6/8

2/18

DocID17922 Rev 6

Contents

1

Silicon limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.1

Core limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

1.1.1

Interrupt service routine (ISR) executed with priority of main process . . 6

1.1.2

Main CPU execution is not resumed after an ISR resets the AL bit . . . . 6

1.1.3

Unexpected DIV/DIVW instruction result in ISR . . . . . . . . . . . . . . . . . . . 6

1.1.4

Incorrect code execution when WFE execution is interrupted by ISR

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or event . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.1.5

Core kept in stall mode when DMA transfer occurs during program/

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erase operation to EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

1.1.6

Incorrect code execution when FLASH/EEPROM memory wakes up

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from power down mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

1.2

System limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

1.2.1

Default DAC output level when output buffer is enabled . . . . . . . . . . . . 11

1.2.2

32.768 kHz LSE crystal accuracy may be disturbed by the use of

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adjacent I/Os . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1.2.3

RTC LSE failure can be detected just once after power-on reset . . . . . 11

1.3

Peripheral limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.3.1

SPI2 peripheral limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.3.2

I2C peripheral limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

1.3.3

USART peripheral limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

1.3.4

Timer limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17