How to switch form stop1 mode to shutdown mode of stm32l4

[Bhushan]

Hello,

We are using low power modes of the stm32l4,

i.e. sleep1, stop1 and shutdown modes.

Requesting you to resolve the below queries,

1. Before entering into each mode, which pre-configuration required?
2. How to switch from sleep1 to stop1 and stop1 to shutdown mode?
3. Do we need to do the reconfiguration of the clock after wakeup from each mode?
4. Do we need to set the clock before entering into each mode?
5. Is there any document available to explain the detail procedure before entering into low power mode and after wakeup?

Thank you in advance.