Dennis Field / dvk-mx8m-bsb - History

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).

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

Add notes regarding I2C's 3V3_OUT supply and the fact that it is sourced from NVCC_3P3 (3A BUCK6), add additional notes regarding the RTC and Camera's I2C slave address, reannotate the whole schematic (nearly the last time)

Add IRQ# signal coming from the RTC, go over the SoM pins and fix lingering errors that are found

Begin GNSS schematic using MAX-M8 module

Since UART2 isn't brought out then will either need to use UART1 (debug) with jumpers or the module's I2C interface.

Resolve merge conflict after pulling recent commit, now can no longer use SSH (since Gogs is getting abandoned?).

Add camera/CSI circuit, include second switch that is part of the audio+camera DPDT for killing both simultaneously, level shifters used for camera's I/O that requires it, footprints for a 1.8V LDO which may be used by DVDD will be included

External DVDD (1.8V LDO) needs to be tested if it's needed (datasheet says an internal DVDD can be used, as is the case with Boundary Devices' OV5640 camera).