Hej,
I have a MSP430F135 that sports a 32kHz oscillator on XIN/XOUT and a DSC1001 MEMS oscillator at 8MHz on XT2IN that I disable in LPM3 using its STANDBY input.
Prior to entering LPM3 I switch MCLK to LFXT1 and SMCLK as well. Then I put the MEMS into standby.
Now, when I put the application into low-power-mode 3 (LPM3) the above mentioned circuit draws about 340uA.
As soon as I put my finger on the XT2IN, it introduces quite some noise BUT also the current drops to 14uA.
So I suspected the input to be floating and added a 100k pulldown. However, the circuit still draws 340uA instead of the desired 14uA.
Has anyone a clue how to solve this? I'd rather like to not ship a standard-finger with every device..
Thanks in advance, Joern.