STM32L475RC - reconfiguration of peripherals necessary when switching between power modes?

[mcoc7n]

Hi,

I'm working on a project with a STM32L475RC.

Depending on the operating status the STM32 is switched between different run modes like run mode, low power run mode and shutdown mode. When switching from run mode to low power run mode the clocks are also reconfigured.

I'm facing the problem, that the SMBUS/PMBUS communication is sporadically disturbed and now I'm wondering if for example the SMBUS peripheral has to be reconfigured when switching between different power modes and/or the clocks are reconfigured.

Can someone tell me something about this?

Thanks in advance.

[TDK · Accepted solution]

If the peripheral clock changes, then yes you need to account for this by adjusting the prescaler. After shutdown mode, the peripheral is reset and needs reconfigured entirely.

[mcoc7n]

OK thanks. That answers my question..