stm32l073x Errata/flash configuration issue

[rcpcelikkaya]

i have been working in these days with stm32l073x.I want to run MCU with stop mode.But i have a doubt about reading the errata.How can i interpret correctly the following conditions in the errata datasheet?does the issue occur when two conditions re faced or only one conditon of them is faced ? I m confused with the issue...

• The internal regulator is set to Range 2 or Range 3 before entering Stop mode
• VDDpower supply is below 2.7 V.

[Imen.D]

Hello @rcpcelikkaya​ ,

Both conditions must be met: Vdd must be below 2.7V and user must use Range2/Range3 in Stop mode.

If Vdd is more than 2.7V then device works correctly in all Ranges.

If Range 1 is used then device works correctly also if Vdd<2.7V .

Hope my answer helps you.

Best Regards,

Imen.

[rcpcelikkaya]

Hello

Thanks for your feedback 🙂 i got it.i will apply it in the way you said.

Best regards..

[Imen.D]

Hi @rcpcelikkaya​ ,

Note that this restriction occurs only in revision A devices.

Best Regards,

Imen.

[rcpcelikkaya]

Hi Imen..

How can i learn whether its revision is A or not?

Best Regards,

Recep

[Tesla DeLorean]

Read DEV_ID from DBGMCU, or see what ST-LINK Utilities or STM32 Programmer report.​

[rcpcelikkaya]

Thank you Clive.

Best Regards..

[Imen.D]

Hi @rcpcelikkaya​ ,

1- The revision code is marked on the device : Please refer to the datasheet on section "7 Package information", in "Device marking" paragraph.

https://www.st.com/resource/en/datasheet/stm32l073rz.pdf

2- You can read 'DBGMCU_IDCODE' register.

Bits 11:0 DEV_ID[11:0]: Device identifier 

Have a look to the RM0367, in "33.4.1 MCU device ID code" section.

Kind Regards,

Imen