ACK: Ack that packet has been
successfully received
NAK: Reports that the device
temporary cannot send or received data. Also used during interrupt transactions
to inform the host there is no data to send.
STALL – The device finds it’s
in a state that it requires intervention from the host.
SOF
Explain various aspects of USB
Device
Explain the significance of End
point, buffer associated with them. How EP helps achieve improved throughput?
Maximum number of buffer?
What are the buffer
configurable parameters?
Explain significance of EP0,
why is it compulsory?