User's Manual

Table Of Contents

Realtek DWA User Guide.doc

1. Introduction

This document describes the operations, interfaces, schematic and layout of

Rev. 2.1 of the NEC DWA Demo Board. The DWA is the hub function device

to connect wired USB device with wireless USB host controller. If the

upstream port is connected to host PC with USB cable, DWA worked as wired

USB Hub device. If DWA upstream port isn’t connected to host PC, DWA

can worked as wireless USB Hub device.

2. System Description

The DWA supports the following functions:

 Compliant with USB2.0(max. data rate=480 Mbps)

 Supports for 4 downstream facing ports.

 Support full speed and low speed transaction on downstream facing.

 Supports switches to select associated hosts and LEDs to indicate

connecting host.

 Support 53.3M, 80M, 106.7M, 160M, 200M, 320M, 400M, 480Mbps.

The DWA system mainly consists of two main chips – (i) UWB

PHY(RTU7010), (ii) NEC MAC(UPD720180). Up to two antennas can be

supported by the UWB PHY for performance improvement. A serial

EEPROM(256K) is required to store proper data/commands for the PHY chip

and MAC chip. To make the system work properly, the EEPROM should be

loaded with proper content by using the EEPROM utility provided by NEC.