topic Re: CLOCK BUFFER 9dmv0431akilf in Layerscape

CLOCK BUFFER 9dmv0431akilf

Ellu24 — Tue, 17 May 2022 07:32:34 GMT

I wish to use 9dmv0431akilf clock buffer as in reference design. what is DNP resistor mean and is it necessary to use? why VSW mode is connected to both power supply and gnd using dnp?

Thanks in advance

Re: CLOCK BUFFER 9dmv0431akilf

teddy_gom_e — Tue, 17 May 2022 11:44:37 GMT

DNP : Do Not Populate.

This is cabling option when you want multiple options on a PCB.

Re: CLOCK BUFFER 9dmv0431akilf

Ellu24 — Tue, 17 May 2022 23:30:44 GMT

So is it necessary to add both when I design as shown in figure and is DNP resistor same as that of normal resistor?

Re: CLOCK BUFFER 9dmv0431akilf

teddy_gom_e — Wed, 18 May 2022 12:52:03 GMT

This is not mandatory. this is just to ease schematics when you're unsure of option you want or when you want to have a pcb for multiple usage.

If you know exactly what you want, example pin X to VCC, set this resistor and do not add the other one to your schematic and you will not need to set an unused resistor to "DNP" state.