I need to go into low power and retain RAM. The VLLS3 mode should do this no problem. I have taken the demo application "power mode switch" to base my application on. The demo seems to work fine going in and out of power modes. But, when I check the SRAM contents of data should not be lost on wake it always reads zero. I added a "count" variable which is output to the UART and the count should be incremented each time the device is put to sleep. But the count always reads 0.
Should I be doing anything special to retain the SRAM during VLLS3?
I have created a standalone project and attached.
Original Attachment has been moved to: k22f_low_power_standalone.zip