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2 / 18 page 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 or event . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1.1.5 Core kept in stall mode when DMA transfer occurs during program/ erase operation to EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1.1.6 Incorrect code execution when FLASH/EEPROM memory wakes up 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 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 |
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