Lpc2000

These pins do not have any source transistors, they are strictly 
open-drain output or an input. Changing P0.2 & P0.3 to GPIO will not 
connect source transistors as they do not exist. As has been said many 
times ... RT*M.

BTW, drive the leds by sinking current rather than trying to source. If 
you do this you also have the option of tying the leds to a +5V supply 
(through resistors of course) if that is more convenient.

*Peter*

mahbub1833 wrote:
> Yes, P0.2 and P0.3 are I2C pins. But my question is when I enable the 
> pins as GPIO (in IAR by PINSEL0_bit.P0_2 = 0x00; and PINSEL0_bit.P0_0 
> = 0x00 ;), then the supply voltage should change to 5v. Isn't it?
>
> Doesn't the voltage change with the change in behavior?