After using LPRUN mode to display a clock on an LCD, returning to normal mode crashes.

[brianpaterson]

During normal mode, it displays. All is well. We go to LPRUN mode to save power and only show a clock on the LCD

During LPRUN, the clock displays but on exiting back to normal mode, the DCU gives an under-run error condition. LCD goes black, system crashes.

System clock during LPRUN is set to 24MHz. Almost all peripherals are disabled.

Any thoughts?

Thanks,

Brian

[brianpaterson · Accepted solution]

Solved it.