USB-100 Fujitsu Semiconductor America Inc, USB-100 Datasheet - Page 61

• Manufacturer Part Number: USB-100
• Description: KIT STARTER FOR USB
• Manufacturer: Fujitsu Semiconductor America Inc
• Type: MCUr

Specifications of USB-100

• Contents: Board, Cable
• For Use With/related Products: MB91F662
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 865-1108

4.8
USB device.
hub. At the beginning of the connection, the device is always assigned to address "0". Thereafter,
the host assigns an address from 1 to 127. Each function and hub has several buffers for
transferring data over the USB called endpoints. A full speed device can have up to 16 endpoints,
while a low speed device can have up to three. Each endpoint is defined with an endpoint
number, transfer direction, transfer method, and maximum packet size. Each definition uses a
specific endpoint. All USB devices must have endpoint 0 to support control transfers.
The host communicates by specifying addresses and endpoint numbers that it assigns to each
When the USB device is connected, the host assigns a unique address to each function and
Configuration of a device
Figure 4.8-1 Addresses and endpoint numbers
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