LPC802 Resets out of deep sleep or power down modes

[mike10]

I’m using the WKT timer to wake out deep sleep or power down modes on the LPC802 (Not deep power down mode)  but the part resets after the timeout rather than continuing after the WFI instruction. I have verified that my power down code does indeed power down. I have checked that the WKT functions. But if there is a WFI after loading the WKT value register it will reset rather than continue after the timeout. The Enabled WKT ISR never gets vectored to. Is this normal?  The LPC812 continues after the WFI. But the LPC802 seems to act differently. 

Any help would be appreciated.  Is this normal operation or am I missing something?

Thanks,

Mike. 

[Alice_Yang]

Hello ,

You  can use the power_mode_switch demo under SDK to test on your side,

download from: https://mcuxpresso.nxp.com/en/select 

BR

Alice