Route USB2 to the hub chip's upstream port and re-order & route each of the downstream ports to their respective locations (smartcard, mPCIe, & M.2), place and route the HDMI fuse, schottky diodes, TVS diodes, capacitors, and pull-up resistors, route the rest of the HDMI's interface to the SoM (HPD & I2C), adjust the GNSS antenna's CPW width using the PCB manufacturer's recommendation from their calculations

The HDMI circuit should be complete now. The GNSS & WiFi+BT antennae should also be complete. The GNSS module's RX & TX lines need to be routed next.

Add ANT-LTE-CER-T as the baseband modem antenna into the schematic and BoM, update the layout accordingly

Update the antennae footprints and feedline layout dimensions using the new stackup and relative permittivity given by the manufacturer, cut off the top corner of the speaker's pad #2 in order to make sure it does not hang off the top of the board

The GNSS CPW will likely be double checked by the manufacturer soon.

The diff pairs going to the NFETs are exactly matched to 0 with their phase/skew; 1V8P still needs to be brought to them.

Fence in the rest of the GNSS antenna area and fix the VBUS via array near the charge controller (now locked)

To be fixed: Accidently moved vias near U301 (by dragging/shoving other signal).

As this signal can carry a 25MHz square wave, a guard ring connected to GND was added.

Add stitching vias around the WiFi+BT antennae on the top-right section of the board, the vias form a fence-like structure and prevent interference in both directions

The rest of the path still needs to be stitched (around the GNSS antenna), and wrap around next to the earpiece speaker, which needed to be shifted slightly to the left. Once the proper via locations are determined between the speaker and the GNSS antenna area, the speaker can try to be placed as-close-as-possible to the horizontal-center of the board (at X=105mm).

The MHF4 spec sheet gives dimensions for a 50Ohm CPW coming from it, however this feedline is actually a microstrip line and therefore it should follow our specific width requirements (using our relative permittivity and top-to-bottom spacing). The width of the feedline will need to be adjusted once the permittivity between the top and bottom layer with the inner layers being void is given/known (at ~3GHz).

Shortened/straightened connection SD-card <-> SOM

Correct and complete the USB and HDMI serpentine bend skew/phase routing such that each diff pair is tuned/matched to 0mm. Place each of the tuning meanders at the correct corresponding locations by going down the line and setting each of the pairs' proceeding segment length to being an equal stub, checking the overall skew, making the correction near the problematic bend (so long as the next "correction" bend is >15mm away), and going down the entire line doing this.

Each of the diff pairs now have a 0mm intra-pair skew (with the exception of three very short USB-C pairs between the CMF&ESD IC and the receptacle) which still have a skew within the <1ps~=150um spec (is actually <100um).

Adjust the dimensions and move the placement of the serpentine bends to the recommended values & locations for the USB diff pairs and the HDMI CLK line

This same thing still needs to be applied to the other HDMI diff pairs.

Continue optimizing the HDMI diff pairs and use <2*Gap for the amplitude and <3*Width for the spacing on the USB serpentine routing

These same <2*Gap & <3*Width values still need to be applied to the HDMI diff pairs (along with placing the meander in the correct locations by deleting segments checking the length, and re-adding the segment).

Make the HDMI routing conform more closely to the clearance requirements (30mils between data diff pairs & 50mils from CLK) and add meanders to tune the skew/phase

Coarsely route HDMI diff pairs from the SoM to the CMF&ESD chips, place the microphone in a position that does not interfere with either the HDMI circuit or the RJ45

The HDMI diff pairs will need to try to have 30mil clearance between each other at every point possible, in tight spaces this is not possible, even spacing will need to be adjusted in the following commit.

Needed to create the HDMI_HEAC_P/N labels to route Utility&HPD as diff pairs. Made cap C1905 NC, which is in parallel with a 0Ohm resistor between the HDMI sheilding and GND.

Placed USB Hub under the SOM.
Wired connection SD-card - Hub/SDIO-bridge.
(A few existing connection had to be moved or change layer)
Some details of SD-card (passives etc.) are not yet done.

Give more room between smart-card tracks on the bottom layer and the USB diff pair in order to reduce the potential for crosstalk

Place and route the BOOT_CFG* signals, correct a signal labelling mistake causing SAI1_RXD0 (BOOT_CFG00) to be connected to SAI1_TXD0 (BOOT_CFG08)

BOOT_MODE* still needs to be placed & routed, need to find a good location for the SMD slide switches.

Place and route the WiFi+BT antennae circuits, reduce the radius of the PCB corners in order to make more room for the antennae

The top-right mounting hole is currently placed in an ~odd~ position in order to avoid the (AE1801) antenna's clearance area, a thin 0.475mm wide strip runs from the two ground planes to this mounting hole (between the two antennas' occupied area).

Add WiFi+BT antenna footprint, add pi matching circuit to the WiFi+BT antennas' feedlines, increment the capacitor part numbers on page 18 after adding the new (NC) feedline caps and make the respective changes to the reference designators in the BoM

Connections to speaker, mic, HKS and SOM not finalized because they depend on general placing.

Move and route the bypass caps and ferrite bead filter circuit for the GNSS's VCC & VCC_IO power inputs (coming from 3V3_P)

Connect the mPCIe mounting holes to ground, use common dimensions for the mPCIe mounting holes, update THT vs SMD definitions for various footprints, re-update all footprints in the layout

Place and route the GNSS antenna and its feedline, re-calculate the coplanar waveguide to 50Ohms using EmCraft's baseboard parameters (include new calculations), make the M.2 mounting hole connect to GND and use the recommended size for the hole's dimensions