simce
Full Member level 4
Hi,
I read a bit about USB2.0 standard but i'm not sure that i understand correctly one thing. Well as i uderstand when USB2.0 device is connected on USB2.0 host, then enumeration process goes with Full Speed and then device announces in descriptor that it is cappable of handling USB2.0 transfers. Then host switches speed to high speed (480kbs) and from this point communication goes with this speed. Did i understand correctly?
We'll now comes additional question:
Is it possible this scenario:
1. When device (USB2.0) is connected to host (USB2.0), device announces that FS communication is requred.
2. Enumeration process goes fine and host and device can communicate with FS.
3. Later in time i'd like to know if there is any way of switching communcation to HIGH speed without need of starting new enumeration process?
Thank you.
I read a bit about USB2.0 standard but i'm not sure that i understand correctly one thing. Well as i uderstand when USB2.0 device is connected on USB2.0 host, then enumeration process goes with Full Speed and then device announces in descriptor that it is cappable of handling USB2.0 transfers. Then host switches speed to high speed (480kbs) and from this point communication goes with this speed. Did i understand correctly?
We'll now comes additional question:
Is it possible this scenario:
1. When device (USB2.0) is connected to host (USB2.0), device announces that FS communication is requred.
2. Enumeration process goes fine and host and device can communicate with FS.
3. Later in time i'd like to know if there is any way of switching communcation to HIGH speed without need of starting new enumeration process?
Thank you.