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High all,
Can anyone tell me why Port A and Port E would draw high current when in digital mode connected to +5V to read a DIP switch?
I have ADCON1 = 7
and have the 1st 6 bits connected to A0 to A5 and the last 2 bits to E0 and E1.
I am reading currents of 200mA being drawn by the 16F877A ( frying!)
I read the datasheet of PortA and it seems that when in digital all is just TTL inputs.
What have I done wrong?
Regards
Chris
Are you sure you have all pins connected to +5V configured as inputs?
Yes, I think I have
ADCON1 is set as 7, trisA=1 and TrisE0=1, trisE1=1 and trisE2=1
Regards
Chris
If TRISA = 1 you only have PORTA.0 configured as an input. If you're using A0 to A5 then
you'll need TRISA = %00111111.
Hi Bruce,
How stupid can I get, I am so used to setting a whole port to outputs with trisA=0 that I forgot that BIN 11111111 = DEC 255.
Excuse me for wasting your time!
Regards
Chris