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What is the relationship between the host controller and driver?

Latest Updated:08/01/2005

Question:

What is the relationship between the host controller and driver?

Answer:

The host controller controls USB devices, but that control method follows a set of rules determined by the software.
In other words, its operation could be described as reading a procedure manual provided by the software, operating accordingly, and then supplying the results as feedback to the procedure manual.

The software that manages the procedure manual is the device driver.
Without the driver, the host controller cannot function.

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