regarding start of frame packet in USB

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arun397

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hi,
i have earlier posted few posts regarding my project USB device core on a FPGA ......
i would like to know whether a SOF packet is required to be added(written) in the code for a USB device ...............
thank you.........
 

Devices do not generate SOF. Only Hosts (root controllers and hubs) generate SOF. If you build a full speed (12 Mbps) device, the Host will send SOF to your device.

If you are building a Host (for example, for communicating with a USB device such as memory stick): low speed (1.5 Mbps) does not generate SOF, full speed (12 Mbps) must generate SOF.
 

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    arun397

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so u say i need to include it in my code to receive SOF from the host.........
i did not get u exactly can u be more clear please..........
 

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