MC9S08QE8 -> stop current grow as VDD goes up

[MrTester]

I have an issues with my MC9S08QE8 project: I am running on a 32Khz external xtal

While I am in stop3 the current is going up while VDD goes up :

VDD = 2.7V  current = 20uA -> this is normal

VDD = 3.0V current = 200uA -> this is not normal

VDD = 3.3V current = 1mA -> I dont undestand what is happening??

If you got any idea please let me know

Thanks.

[bigmac]

Hello,

Check that all unused pins are either set as outputs, or if they are inputs, they have pull-up enabled.  If you are using a lower pin count package, this also applies to I/O that does not have an external appearance.

Are you actually measuring the current into the Vdd pin, or perhaps you are measuring the total input current tjo the board.  It may be possible that other devices on the board are consuming current.  Is the DC power fed directly to the MCU, or is there a (low drop-out) regulator present?

Regards,

Mac