Assign placeholder footprints to WWAN antennae (identical to GNSS ones for now), add haptic motor schematic symbol and split up the connector and motor footprints, now ready to generate netlist and import it into Pcbew without errors

Add proper WWAN reset circuit using a MMBT2222A NPN BJT along with a 100nF cap and a TVS diode, make needed adjustements to the WWAN's SIM card circuit (UIM-CLK and UIM-RESET caps are NC & added 4.7k series resistor to SIM_DETECT_O#), assign the MMBT2222A footprint to KiCad's official SOT-23 footprint (identical to the spec sheet's recommended land pattern)

If necessary, the NC cap pads on UIM-CLK and UIM-RESET can be tested with various values during the first prototype debugging phase.

Add pull-up resistor to nCS pin of the NOR flash chip, make electrolytic caps tantalums again due to a the price difference not being significant

Add mounting holes to the schematic and assign the associated M2 hole footprint, add fiducial marks to schematic and assign the associated 1mm diameter copper with 2mm diameter solder mask opening footprint, make various visual adjustments throughout the schematic

Replace WWAN M.2 circuit with one intended for mPCIe modules, include 74LVC1G08 single 2-input AND gate, create the AND gate's footprint and use the official SOT-23-5 3D model

The mini-SIM slot will need to be replaced with one that has an active-LOW detection pin. Will want to see if we can find cheap electrolytic to replace a few of the tantalum caps with (not all since we still need some low ESR, high capacitance, low profile, caps).

The only difference between these two part numbers is the reel the chip comes in, both are identical ICs.

Add BLM18PG121SN1D chip ferrite beads to the GNSS, proximity+ambient light sensor, and IMU +3.3V power pins

Add the BQ25896 charge controller's missing pins which may make the schematic a bit ambiguous, reduce the value of the VBAT_REG LED's current limiting resistor to 1k in order to make it a bit brighter

This commit is thanks to our design reviewer's feedback.

Move the ground connection on the USB-C receptacle from the shield pin to the GND pins (shield is still connected to GND via the 0 ohm resistor), make the cap between the receptacle's GND and shield NC

This commit is thanks to the feedback from our design reviewer

Add AC coupling caps to the HDMI_AUXP/N diff pair which were mistakenly left out, fix a couple typos/errors that were made when transitioning to the new top-leve sheet, make the M.2s' I2C RX TX hierarchical signals consistent and clearer

Hopefully all lingering errors have been caught, this will likely be the schematic commit that gets reviewed (fingers crossed).

Assign TLV3201AIDBVR footprint based on the SOT-23-5 official footprint using the given solder mask clearance and pad clearance parameters, assign the QFN48 3D model to the ETH PHY footprint, make some minor adjustments to the front sheet's layout

Create AP22814 footprint and assign it to the respective symbols, use DFN-6-1EP_2x2mm_Pitch0.65mm 3D module for AP22814

Reorder USB-C's diff pairs based on layout simplicity as done on EmCraft's Rev 2 baseboard (requires Lane Polarity Inversion), add 2 and 3-channel differential filter & TVS IC footprints (used with USB-C and HDMI), import USB-C receptacle 3D model

Used a scaled version BGA-256_16x16_17.0x17.0mm_Pitch1.0mm 3D model for the filter&TVS diff pair chips, the perimeter balls are not very noticable at this shrunken scale and can be replaced later on (placeholder).

Remove emcr_mx8m.* files as they're no longer used, rename Purism_landscape.kicad_wks file to purism_landscape.kicad_wks (prefer all lower case letter for ease of use)

Move more symbols, sheets, and pins around on the front sheet to make it even clearer, bring back the old hierarchical structure (again), bring back each sheet's title, add large text "titles" to each sheet reflecting what they are for

Still need to double check everything on the first page.

Reorganize the top-level sheet to make more room and allow most wires to be straight connections to their respective locations

Pin assignments still need to be double checked against the current one in the master branch.

Add GNSS antenna footprint including correct 50Ohm feed line dimensions and keepout area, add u-blox MAX-8 3D model, rename all instances of MAX-M8* to MAX-8* due to part selection, antenna feed line calculatos included (coplanar waveguide)

Need to add placeholder footprints for the other four antennae which will be represented as simple rectangular areas where the antennae will occupy. After that, all that is left is to assign the various remaining IC footprints and finally import all footprints into PCBNew & begin layout!

Assign jumper header footprints and component properties, selected based on required current rating and minimized area occupied, assigned 1.5mm diameter test points

more direct connections instead of labels
interconnection of schematic blocks (e.g. USB hub) is made visible
format of page is now A3 instead of A2 -> better font quality when printed on small paper

new library with symbol of Emcraft-SOM (for later use)

egarding the DPDT switches' & logic gates' pins being interchangeable

Used right-angled JST 2.5mm connector scaled in half as the motor connector footprint & 3D model, included 1cm distance from haptic motor placement from the edge of the connector (shown on silkscreen).

Add quartz crystal footprints, reassign BHC-18650-1P footprint & associated component properties, add BHC-18650-1P 3D model

Connect VCC of the USB1_VBUS comparitor (TLV3201AIDBVR) to 5V_SOM instead of 5V_P so that VBUS presence can be detected quickly enough for the USB Serial Downloader bootmode, connect the TVS diodes on the HDMI receptacle to the proper pins

Using Lite-On's LTST-C190GKT (0603, 2.1V @ 20mA) instead of Broadcom's HSMG-C170 (0805, 2.2V @ 20mA) in the ethernet circuit.

Add decoupling/stitching capacitors to the 5V_P, 3V3_P, and 1V8_P rails which will be spread through the respective power planes (not necessarily having to be near chips)