Usb Device Generic Framework; Usb Device State; Figure 6-29: Enumeration - Seagate M8U-Internal SpinPoint Product Manual

INSTALLATION

6.3.6 USB Device Generic Framework

This chapter describes the common attributes and operations of the protocol layer of a USB device.
6.3.6.1

USB Device State

A USB device has several possible states. Some of these states are visible to the USB and the host, while
others are internal to the USB device. This section describes those states.
This section describes USB device states that are externally visible (see Figure 6-28). Table 6-4 summarizes
the visible device states.
Note: USB devices perform a reset operation in response to reset signaling on the upstream facing port.
When reset signaling has completed, the USB device is reset.

Figure 6-29: Enumeration

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