Microchip OSC1/CLKI pin to ground when internal osc configured?

[Zeyneb]

Hi everyone,

Would this be an idea? For the purpose of things such as saving current, avoiding noise coupling into a high impedance net, ESD protection.

Or is the silicon already doing this for me when the configuration bits are programmed for an internal oscillator.

My MCU is the dsPIC30F3012 but I think it applies to every microcontroller I assume.

Thanks a lot!
Zeyneb

[Scrts]

You should be careful with OSC2, since it can be output. I don't think you will save much by grounding these pins. OSC1 might be an option, but it will be internally disconnected if internal source is selected. I always leave a place holder for XTAL anyway. You can then replace the load caps with 0 ohm resistors, since these caps are connected to ground anyway.