CubeIDE, STM32F446RE and SAI2

[ACAV]

As datasheet states (more than once) the LQFP64 package of the 446RE has 2 SAI blocks (both with SAI-A and SAI-B) and in the HAL driver/definitions stm32f446xx.h both are available, but I'm not able to select the 2nd SAI in Cube (it is not shown there !), so the pinout caanot be done ! Any idea what happens there ?

[TDK · Accepted solution]

The LQFP64 package doesn't have the necessary pins broken out to access SAI2. In particular, SAI2_SCK_A, SAI2_SD_A, and SAI2_SD_B are missing which renders SAI2 unusable, even if it is technically on the chip.

[ACAV]

Please see the AF table (Alternate Functions) in the datasheet. There, the SAI2 pins are brought out... also in the Pinout table, PA1,PA2,... are notes as "SAI2..." in teh LQFP64

[ACAV]

Sorry, you are right... only some of the pins are available, many clocks but NOT any of the SD (data) pins :(

[Khouloud ZEMMELI]

Hello @ACAV​ ,

Thank you for your post,

You're right, for the whole STM32F446 family, we should have 2x SAI.

Thank you for raising this issue to our attention, it will be fixed 🙂

Khouloud