Hello, Reference manual of STM32U575/585 Arm®-based 32-bit MCUs (RM0456) does not mention the bit 31 in register ADC_CFGR1. However, this bit is used in library and injected channels can not be executed without setting this bit. Assumption: JQDIS bit

[KDJEM.1]

Hi @WSief.1​ and welcome to the Community :),

Thanks for your contribution

Could you please share the file where the bit 31 of ADC_CFGR1 register is mentioned in the library?

I checked all the header files under “STM32Cube_FW_U5_V1.1.1\Drivers\CMSIS\Device\ST\STM32U5xx\Include�? but I didn’t find the definition of 31 bit in ADC _CFGR1 register.

Kaouthar

[WSief.1]

There is no definition in header files (missed information that the reset value of register is 0x80000000). After reset of uC this register is set to a value 0x80000000.

This value is mentioned in reference manual. Unfortunately i missed the message that this bit must be kept at reset value,

which is 1. The question is if this bit is JQDIS. JQDIS bit is mentioned in errata datashit (STM32U575xx and STM32U585xx device errata).

[KDJEM.1]

Hi @WSief.1​ ,

Thank you for bringing this issue our attention.

The 31 bit in the ADC_CFGR register is reserved and by default set to 1.

I confirm that bits JQDIS and JQM are not available in STM32U5, so the Errata Sheet  will be updated accordingly.

I reported this issue internally.

Internal ticket number: 133618 (This is an internal tracking number and is not accessible or usable by customers).

Kaouthar

[KDJEM.1 · Accepted solution]

Hello @WSief.1​,

This typo is fixed in ES0499-Rev5.

Thank you.

Kaouthar