mimi123 wrote:Have you the KiCAD of your design? Much more important than shematics.
Thanks for pointing that out i think i'll do that in the next revision same with the USB Ports too .I would put the crystal closer to the LAN9512, usually it's a requirement, to put it as close as possible. The upper usb connector could be safely moved upwards.
Are you going to publish the eagle files for this project?
Did you keep the resistance of the USB connection in mind?
USB2 spec calls for 5v +/- 0.25v officially so technically you are still within the specifications. Many devices actually run on lower voltages and simply feature onboard regulation anyway and will work over a larger range than spec calls for, heard of the ralink wifi adapters function at as low as a 3.5v vccBriarios wrote:Did you keep the resistance of the USB connection in mind?
Oh yes the hardest part about this that i had to learn on the fly was getting the USB and Ethernet to meet specifications once that was done, everything else was easy.USB2 spec calls for 5v +/- 0.25v officially so technically you are still within the specifications.
Yes I have considered using the LAN9514 chip, but at this stage i didn't want the hassle of finding space for 2 extra USB ports on the board at this stage, and yes it is possible to use with the compute module because the CM will see it as a USB Hub.Hello, have you considered using the LAN9514 chip? is it possible to use with the compute module?
oooh thats good to know , also is there anything i need to check and make sure with the layout/ schematic or have I covered pretty much most of it?You can get rid of the crystal
6677 wrote:Did you keep the resistance of the USB connection in mind?
For example: With my Board, I needed about 1.4mm trace width.Route bold-ringed signals as matched
length 90R differential pair
A 1.4mm trace is a huge trace. from what I see with your Calculations on that is it looks like you're making a 2 layer board? if so, I can see why you would need quite big traces.With my Board, I needed about 1.4mm trace width.
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