LPBAM in Stop 0 and Stop 1 - STM32U5

[leo8]

In application note AN5652, page 7 states that LPBAM can be used in Stop 0, Stop 1, and Stop 2 modes. On page 10, the peripherals that support autonomous mode are listed. Since I cannot use SPI3, I also cannot use Stop 2.

Can I configure my MCU in STM32CubeIDE (IOC file) to use LPBAM in Stop 1 mode with SPI1 or SPI2? Are there application examples for this? I have only found projects using Stop 2, and the IDE seems to list only the peripherals available for Stop 2.

[Sarra.S]

Hey @leo8, 

In Stop 0 and Stop 1 modes, the autonomous peripherals are: 

ADC4, DAC1, LPTIMx (x = 1 to 4), USARTx (x = 1 to 6), LPUART1, SPIx (x = 1 to 3), I2Cx (x = 1 to 6), MDF1, ADF1, GPDMA1 and LPDMA1

However, SPI1, SPI2 are autonomous only with GPDMA1 and SRAM1 to SRAM6.

And SPI3 is autonomous only with LPDMA1 and SRAM4. 

Hope that helps!