It's not clear why it creates these "rescue" libraries and then starts
referring to them instead of the original library, but I'll commit them
so that other users can open the file.
Signed-off-by: Sean Cross <sean@xobs.io>
It was listed as a part number from Diodes, Inc. The MPN and
Manufacturer were correct, but the schematic part number was wrong.
Signed-off-by: Sean Cross <sean@xobs.io>
Having a full regulator on VCCPLL causes the ESD network in the ICE40 to
freak out, dumping VCCPLL into GND and trying very hard to burn out the
regulator.
Replace it with a simple RC filter network, which is less clean but
results in a happier ESD network.
Signed-off-by: Sean Cross <sean@xobs.io>
Previously, we would end up shorting power to ground all the time
because the diodes were right on the marginal edge.
Signed-off-by: Sean Cross <sean@xobs.io>
Somehow, KiCad added these strings to the parts libraries, which
resulted in referencing a file that didn't exist.
Remove them.
Signed-off-by: Sean Cross <sean@xobs.io>
We probably don't need 10nF, because this won't do any very-high-speed
(>100 MHz) operations. We can think about putting them back in later,
space permitting.
Additionally, remove an extra bank of caps for one of the IO pads.
We'll double-up on capacitors there, which should be alright given the
close proximity and the fact that the only thing on that IO bank is
captouch.
Signed-off-by: Sean Cross <sean@xobs.io>
FPGAs are great, because if there's an alternate method that's easier to
route -- go for it! This modifies some of the connections to ease
routing constraints.
Signed-off-by: Sean Cross <sean@xobs.io>
This is the first cut of a schematic layout of DVT1.
It includes all the decoupling caps still. We'll need to see if they're
kept around.
Signed-off-by: Sean Cross <sean@xobs.io>
This removes much of the support debugging stuff from evt1. Still to
do:
- Assign footprints
- Figure out which PU resistor to include (if any)
- Figure out if we need to keep the USB buffering
- Remove extra decoupling caps
Signed-off-by: Sean Cross <sean@xobs.io>
Add a crystal, so we can test to make sure it works.
Also add a second regulator dedicated to VCCPLL in an effort to
cost-down the capacitor and large components that shouldn't be
necessary.
Signed-off-by: Sean Cross <sean@xobs.io>
