Adjust some high level placement like M.2 or CM4 and heatsink. Remove
all traces and vias since most of the layouting has to be redone
anyways.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Instead of using VBUS to power CP2102N use the main/NVMe 3.3V supply.
This makes sure that the device stays powered during reset, while making
sure the CP2102N is always powered and doesn't backfeed if no USB is
plugged in.
Signed-off-by: Stefan Agner <stefan@agner.ch>
- Replace unusual/high value ceramics with lower value in parallel
- Use the same protection Shottky Diode in PoE as in regular input
(B340LB-13-F)
- Replace PoE rectifier Diodes with B1100-13-F
- Replace PoE Inductor (SRN6045TA-3R3Y) with the same part from 5V power
supply (Taiyo Yuden NRS8030T3R3MJGJ)
- Correctly specify Pulse Electronics transformer
Signed-off-by: Stefan Agner <stefan@agner.ch>
- Use Diodes B2100-13-F consistently
- Define part for pin headers
- Replace N-Channel MOSFET for PoE with BSZ440N10NS3GATMA1
- Define Input protection MOSFET DMP3013SFV-7
Signed-off-by: Stefan Agner <stefan@agner.ch>
Remove power/reset/recovery switch. Power and reset is not really required
and recovery mode (USB Boot) can be triggered via jumper. Make the Fan
and RPiLED a new separate config so we can leave them unpopulated. Add a
second GPIO controlled switch.
Fixes: #16
Signed-off-by: Stefan Agner <stefan@agner.ch>
The Rohm has a lower current rating and input voltage range, but should
be good enough for our use case. It has better availability and is quite
a bit cheaper than the Diodes part. This also requires different
inductors and some different resistor values.
Fixes: #12
Signed-off-by: Stefan Agner <stefan@agner.ch>
Use a jumper instead of a switch to change between CM4 USB Device and
CP2102N. Replace CP2102N QFN24 with QFN20 variant. Make CP2102N to be
bus-powered by default.
Fixes: #7
Signed-off-by: Stefan Agner <stefan@agner.ch>
Use a through hole 3.5mm Audio jack to make sure it does nto get teared
off the board accidentially that easily.
Fixes: #9
Signed-off-by: Stefan Agner <stefan@agner.ch>
Make sure those signals are well defined even when not be driven from
the CM4 side. Also rename Radio.BOOT to Radio.~BOOT since its a low
active signal.
Fixes: #10
Signed-off-by: Stefan Agner <stefan@agner.ch>
CRFILT capacitor is required for the chip to start properly
and 10k pull-downs were too strong according to the datasheet.
Signed-off-by: Dominik Sliwa <dominik@sliwa.io>
Use the correct footprint for the PoE bulk capacitor C80. The TI
evaluation module circuit uses a Panasonic EEE-FK1J470P bulk capacitor.
The series has other better suited alternatives like EEE-HA1J470UP, but
the F-size code seems to be a sensible choice.
Fixes: #1
Signed-off-by: Stefan Agner <stefan@agner.ch>
Add the CM4 board to board connectors using separate symbols. This is a
bit a hack, but makes sure two pieces appear in the BOM.
Also, this seems to upgrade all the schematic to the latest KiCad
schematic version.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Make sure the right path to 3D models is set in various footprints on
the PCB. Assign the M.2 footprint from our 3D library.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Improve/fix most silk screen placement of most parts. Decrease size to
0.8mm by 0.8mm and 0.15mm thickness which works for most PCB manufacturers.
Signed-off-by: Stefan Agner <stefan@agner.ch>
