Important. Insightful.
6 layer FR4 laminate, TI TMS320F28388D microcontroller, 512Mb SDRAM, 100Mb Ethernet, CAN 2.0, 4x ArduCAM SPI links…
Small but capable.
Purpose:
This microcontroller board is designed to operate up to 4 SPI cameras and output their video links to the IP-0000-LR01’s internal ethernet network.
Layer 1
Layer 4
Layer 3
Layer 6 (inverted)
Images above from 8/9/20
Update 2/19/21
I have rerouted the PCB in order to fit within 4 layers
Images above from 2/19/21
Layer and via stackup
Via configuration
Whole PCB
***All units are metric.*** > Board materials + specifications ---> Laminate FR4 ---> Layer count 6 ---> Total thickness 1.61mm ---> Length 80.01mm ---> Width 54.61mm ---> Finish type HASL ---> Copper weight 35 micrometers for all layers ---> Soldermask color Green ---> Silkscreen location Both sides (top and bottom) ---> Silkscreen color White ---> Silkscreen type LPI ---> Impedance matching None ---> Stacked microvias No ---> Blind vias No ---> Buried vias No ---> Minimum drill diameter 0.2mm ---> Minimum annular ring thickness 0.1mm (adding 0.2mm to the vias diameter) ---> Smallest trace width 0.1016mm ---> Smallest spacing 0.1016mm ---> Via in pad No ---> Via plug None ---> Stencil Top and bottom (separate) > Specific layer stack ---> Copper layer 1 0.035mm ---> Core/Prepreg 0.1mm ---> Copper layer 2 0.035mm ---> Core/Prepreg 1.26mm ---> Copper layer 3 0.035mm ---> Core/Prepreg 0.1mm ---> Copper layer 4 0.035mm ---> Total 1.6mm