Low power sleep mode 18f46k80

[longpole001]

hi hendrick , yes i should have been more clear , the tris is set to input , with week pullups enabled , which shows the pin as high (output) during sleep mode

i did try shut those down prior to sleep , which helped but in the end i needed them on so i can use the power sw

think the cct is set for min of 3ma i try find where the leaks are

be good if someone knows the chip well for settings for low power , suck nothing at all sleep
i have good LDO which is powering the cpu at 3v3 with no load on the output and enabled i get about 0.3ma


i have a mosfet controling the 3v3 to anything external to the cpu

[HenrikOlsson]

Hi Sheldon,

Well, if you enable the internal pull-up resistor then "of course" the pin measures "high" - it's being pulled high by the resistor.

The pullup current, according to the datasheet, is 50-400uA @Vdd=5.5V so if you have the pullup resistor enabled and ground the pin you'll get a current of 45-360uA thru the Vdd pin, thru the WPU resistor, out thru the pin and to GND. If you do the same thing with two pins, then another 45-360uA and so on. (This is with Vdd @5V).

The current draw you meassure, is that of the PIC itself or on the input to the LDO? What's the quiescent current of the regulator?

/Henrik.