hello,

I configured RB1 as an input pin. This pin was connected to a push-button
switch (pulled up to Vdd by a 10K resistor).

Case 1:
        bsf STATUS, RP0
        movlw B'00000111'
        movwf TRISB
        bcf STATUS, RP0
        clrf PORTB

Case 2:

When the above code was written the voltage at RB1 was some 1.56Volts.
I changed the code to

        bsf STATUS, RP0
        movlw B'00000111'
        movwf TRISB
        bcf STATUS, RP0
        movlw B'00000111'
        movwf PORTB

But the problem still existed. Voltage at RB1 was still some 1.56 volts.

Case 3:

However when the code was replaced by the following code, voltage at
RB1 showed 4.97 Volts on switch open..

        bsf STATUS, RP0
        movlw B'00000111'
        movwf TRISB
        bcf STATUS, RP0

Can any of you please tell why the voltage of RB1 is reducing in the
first 2 cases?

Also, in order to prevent this, do I need to initialise the output pins in
PORTB individually?

regards,
Rituraj Singh

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.