On Jul 9, 2:49 am, ajay <mna...@gmail.com> wrote: > Now If a pin is pulled up and then PUD register is set to PULL down/PULL > none.what is the effect.
If you set to pull neither, the voltage may change over time - depending on leakage or load currents vs the capacitance of the pin, traces, loads, etc. Generally you try to avoid letting signals float in indeterminate ranges. > And what is the use of setting the PUD register > based on the hardware configuration of the pin. One thing can be power consumption - you don't really want to have an external input working against a pullup/pulldown on a long term basis in a battery powered device. For things that try to enter micropower sleep modes, that becomes an even more serious concern. -- unsubscribe: android-kernel+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-kernel
