PIODev Board Populating & odd parts
While most of the parts on the boards are quite off the shelve and easy to procure, there's a few things that need special attention.
The 2x8 and 2x5 debugging headers mentioned in the BoM file are expensive for what they are, and the plastic shell makes it difficult to solder them properly. They can easily be replaced with SMD headers, such as these.
This is the only part that seems to only be sourceable through eBay and others.
Stocks have been found for this connector, and an online reseller has stocked them. You can purchase the port here: https://store.phenommod.com/index.php?route=product/product&path=74&product_id=103
When building a PIO Dev Board, while ordering on jlcpcb, the top layer will not be populated. Here are instructions to populate it.
There are 14 bypass capacitors to install. All of them are 603 capacitors, and you can use any generic 25V or 50V 0.1uF capacitor for them. They are all marked with "BP" or "BYPASS".
Overall view of the top layer of the PCB:
The 12Mhz oscillator and its bypass capacitor go here. This also the location of the two pcb jumpers:
There are 12 bypass capacitor right on top of the FT2232H. There also 3 ferrite beads, marked with "FB", and 2 ESD diodes, placed vertically on this picture. Note that the silkscreen is indicating polarity for the ESD diodes, but these components aren't actually polarized. This is to help with installing the diodes, to indicate the left/right positioning. And finally, there is one 4.7uF tentalum polarized capacitor for the FT2232H's built in vcore regulator.
Here is the location for the 5v regulator, with its 10uF input tentalum polarized capacitor, and its 22uF output tentalum polarized capacitor. It has one bypass capacitor on the input side.
And near the PIO plug, there is a SOD-123 schottky diode and a 10uF tentalum polarized capacitor on the 3.3v power line. The diode is polarized the same way as the capacitor.
Overall view of the bottom side of the PCB:
Hopefully, the bottom side would've been populated. If missing, here is where to solder the memory chips:
Also, the CPLD's dip switches will most likely not have been soldered, and go here:
