STM32F407 Standby issues

[pirow]

Posted on October 24, 2012 at 17:56

Hi,

We've managed to get our STM32F407 board to cycle in and out of standby using the RTC (once a second). We've also enabled the wake-up line to allow another low power micro to wake it up if needed.

The problem we have at the moment, however, is that if the wake-up line is asserted just before the STM32 goes into standby the STM32 hangs, i.e. the RTC fails to wake-up the STM32 and the board needs to be power cycled before returning to normal.

I've checked the errata sheet - but standby mode is not mentioned. 

Has anyone encountered a similar problem? Any ideas?

Thanks

#stm32-stm32f4-stm32f407-standby

[waclawek.jan]

Posted on October 26, 2012 at 09:33

Any simple code to try?

JW

[pirow]

Posted on October 29, 2012 at 11:23

I've found a similiar post with people having the same problem on the 10x and 20x STM32 processors. Here is the [DEAD LINK /public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Leaving Standby by WakeUp pin and RTC Alarm&currentviews=192#{5D5CE2B2-A70E-4B62-BEB6-0EA6DE4CB220}&RootFolder=/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Leaving Standby by WakeUp pin and RTC Alarm&ContentTypeId=0x0107009D947151ED1E46c998F5DFE02DFA7356&DiscussionParentID=25694&Source=https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Leaving Standby by WakeUp pin and RTC Alarm&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B&currentviews=191&ticket=ST-138079-C7VIndSq2t2U9zthKPaK-cas]link 

[Amel NASRI]

Posted on April 22, 2013 at 12:44

Hi,

Please see the official ST statement on this issue on the other [DEAD LINK /public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Leaving%20Standby%20by%20WakeUp%20pin%20and%20RTC%20Alarm&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B]link regarding the same issue.

Regards,

ST.MCU