Portenta H7 schematic: what is SJ and indcutor values

Official Hardware Portenta Family Portenta H7
1

Hello,

I am looking at the schematic for the Portenta H7. On sheet 7, there are many components labelled SJx. The symbol looks like a resistor. I've never heard of SJ as a reference designator, and I haven't found it on Wikipedia's list. The components also do not have values. What could they be and what is the value? There is also a SJ6 on sheet 2 with the value 0.

I also noticed that L9, L10, and L11 do not have values. The datasheet for the MC34PF1550A0EP uses 1uH as an example. Does the Portenta use the same?

Thanks.

3

Hi @marcelrobitaille.

These are 0 ohm resistors.

The "J" surely stands for "jumper". I would guess the "S" stands for "solder". However, I don't believe it is technically accurate to refer to these as "solder jumpers".

I'm sure the designers followed the recommendations provided by NXP.