Raspberry Compute Module IO Board

Just comparing the specs I see  LAN7500-ABZJLAN7500-ABZJ for 56 pin QFN and the  LAN9512-JZXLAN9512-JZX for 64-pin QFN So you would need to redesign the interfacing I would learn EAGLE to design with

C

Thank you Clem. I'm currently learning EagleSoft and am trying to get libraries to use parts that are directly the same as those that are on the IO board.

A semi clone of the RPi IO board is quite a challenge to learn on !

If you want the video to work make sure you understand about impedance matching and tracking high speed controlled impedance differential pairs !

How will you test your board ?

MK

Honestly I am still in the learning phases of circuitry and such. The board i'm looking to make is or should be pretty basic. It will have 1 HDMI, 1 LAN and 2 USB's to start. Eventually I will add an IR receiver for remote control and possibly on board WiFi. Any help and direction in learning more about designing and developing circuit boards will be greatly helpful.

I question if the Raspberry Pi could handle 1000MBS, it may not have enough CPU power to keep up.

Does the current Ethernet chip not connect over the USB bus?

Yes the Ethernet chip still connects via the USB bus. I have already reviewed that. And will be reviewing the specs on the Broadcom processor.

Oh, okay. When you reviewed the USB bus, what kind of throughput can it handle? (Genuinely interested to know.)

Since I couldn't remember off the top of my head I had to go back through the datasheets and it appears that it can only handle up to 480 Mbps at the High end. So it would appear that using the LAN7500 chip would be overkill in my project.

screamingtiger

     Actually it would be 1000 million bit per second theoretically which comes to a bit more than 100 million bytes per second which overwhelms USB's 480Mbit/s. I would say the problem comes when using external USB disk like SSD which could saturate the interface.

C

Edit corrected statement.