Dennis Field / dvk-mx8m-bsb - History

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

Assign footprints and component properties to all diodes (including LEDs)

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)

Add preliminary Bill-of-Materials, fill in more missing component information such as inductor selection for the 3V3(_P) rail

Most critical components should now be getting ordered.

Replace the AP22800 load switch with the P-channel AP22814 load switch IC due to its reverse current & over current protection capability, add level shifter circuit to the WWAN's DPR signal

Reverse current is no longer an issue with the load switches. One more obvious "TODO" for the schematic left which is to simply place several 100nF bypass caps on the 5V_P, 3V3_P, and 1V8_P rails (investigate how EmCraft is placing these in their layout).

Assign ferrite bead chip part numbers and footprints, add ferrite bead 3D models, Assign VBAT_REG TVS/zener protection diode and its associated footprint & 3D model

Add decoupling capacitors near the WLAN+BT M.2 Key E socket, assign the tantalum capacitors their various footprints, find suitable 220uF tantalum bulk capacitors for the M.2 modules which are rated to 10V

Need to figure out if the load switch IC (AP22800) that derives 3V3_P is fine with having the large output capacitance (no unwanted reverse current).

Make corrections to schematic based on Emcraft's baseboard revision changes

Assign most of the capacitors their respective footprints (most are 0603s), add camera/CSI connector component info, source cheaper distributors for 3.5mm headset jack and RJ45