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FAQ's on Ethernet,UART,USB

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Tan

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I need some FAQ's on Ethernet,UART,USB according to VHDL programming..
Can anyone please let me know if anyone have them..
Thank you
 

dtn_me

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Hi

What is that you are exactly looking at? For design part, u can always refer IEEE specs for Ethernet. For USB you can refer USB forum specs. If you have any specific question about ethernet or USB, let me know.

DTN
 

Tan

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I am sorry for not being clear.I want the FAQ's interview point of view.
Like which type of questions are asked in the interview on these topics...
 

dtn_me

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You need to know the protocol well for any interviews. It can be ethernet or usb, they deal with data transfer. For both the designs, one side there will be a standard bus interface(AHB/PCI/OCP ...etc). On the other side, both will have PHY layer .
In ethernet the main part is transmission & reception of data to & from mac layer. Complete data flow should be understood. Few questions in ethernet include
1. Full/Half duplex difference
2. Ethernet in OSI model
3. Clock frequencies at which ur ethernet is working(10MBPS/FAST/Gigabit)
4. Auto Negotiation concept on phy side etc....

From USB point of view, again the protocol plays the important part:
1. How data is flowing from one end to other end( bus interface to phy & viceversa)
2. Bit stuffing, NRZI etc.
3. Latest evolutions in USB(like OTG)
4. What host is doing & what device is doing etc.
5. Serial Interface Engine part of your USB design

Hope I answered your query in a right way.

DTN
 

    Tan

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Tan

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Thank you so much for your reply.
I am not finding a nice document on ethernet where in i can study and start writing the code..If you have any can u please provide it..

thank you
 

dtn_me

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U can download a free copy from IEEE site. Ethernet specs are freely available on net.
 

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