Tool/software: TI-RTOS
Hello,
For my latest prototype version I changed a few layout things (more compact routing) and the LF-osc with both caps (12pF->7pF) (also the HF-osc but doesn't matter here). It is about exactly the launchpad design with components from other distributors (and without LED/external flash).
From: www.mouser.de/.../ecx-31b-1108368.pdf
To: global.kyocera.com/.../st3215sb_e.pdf
So the last prototype got down to somwhere around 3uA in sleep mode including wakeups of the sensor controller
Now the newer one needs about exactly 1mA .... ~300 times as much with the same code
I fixed it by using the internal RCOSC #define SET_CCFG_MODE_CONF_SCLK_LF_OPTION 0x3 which got me back to 3uA. Took me some hours to find that out. My first thought was that my supplier used some other revision or version, but checked that. All the same.
What's left:
Can anyone explain why that happened? Are there secret settings/constraints for the LF-osc? Everything worked fine in the sensor controller btw. wakup times were correct.
thanks in advance :)
