sleep mode

Christophe · Joined: 10 May 2005 Posts: 323 Location: Belgium

Hello,

I'm measuring current consumtion by my PIC16LF877A; in normal operation : 3,2 mA; in sleep: 2,7 mA, what can be wrong? should be less no?

edit: what is a good way to limit current consumtion ? settings of interfaces, inputs and outputs?

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Christophe · Joined: 10 May 2005 Posts: 323 Location: Belgium

as I go to sleep, pin_b0 stays a floating input pulled down to ground via 47K. Is that a problem?

problem solved...

you have to say: output_float ( pin_B0);

that is appearantly NOT the same as: input( pin_b0);

??? the manual says so

Christophe · Joined: 10 May 2005 Posts: 323 Location: Belgium

IF you are in sleep, and the watchdog wakes you up; WHAT is happening? Is the watchdog resetting the PIC? or does the PIC continue executing instructions

Christophe · Joined: 10 May 2005 Posts: 323 Location: Belgium

the guilty one is found: MAX223 Mad

If I disable the uart: setup_uart(FALSE); -which is connected to the MAX, I drain only 90uA..