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stm32l073x Errata/flash configuration issue

rcpcelikkaya
Associate II

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.

7 REPLIES 7
Imen.D
ST Employee

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.

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Thanks
Imen
rcpcelikkaya
Associate II

Hello

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

Best regards..

Imen.D
ST Employee

Hi @rcpcelikkaya​ ,

Note that this restriction occurs only in revision A devices.

Best Regards,

Imen.

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Thanks
Imen
rcpcelikkaya
Associate II

Hi Imen..

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

Best Regards,

Recep

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

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rcpcelikkaya
Associate II

Thank you Clive.

Best Regards..

Imen.D
ST Employee

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.

0690X000006CEyDQAW.png

Kind Regards,

Imen

When your question is answered, please close this topic by clicking "Accept as Solution".
Thanks
Imen