User guide

http://www.cirrus.com

AN255

Populating the USB Components on the EDB9301

Development Board

1. Introduction

This document provides the information needed to populate the USB area of the EDB9312 board. By de-

fault, the USB components are not installed at time of PCB assembly. This document has a short Bill of

Material (BOM) in Table 1 that identifies the part numbers and reference designators of the components

required for USB operation. Figure 1 shows the component placement on the PCB. The part numbers in

the BOM are all available from DigiKey (www.digikey.com) as well as a variety of other component sourc-

es.

2. Instructions

Refer to the CD for the board schematics. The schematic will show the reference designators and the val-

ue for the parts. Located at the bottom of page 2 of the EDB9301 schematics is the USB circuit. The BOM

for the USB circuit is at the end of this document.

WARNING

The customer is allowed to populate the USB portion of the EDB9301 circuit board without voiding any

warranty only as long as appropriate anti-static precautions, proper soldering techniques and professional

standards of workmanship are followed.

Table 1. USB Circuit Bill of Material (BOM)

Item Quantity Footprint Description Part

Number

Part

Manufacturer

Reference

Designator

1 1 THOLE Connector, USB, Right Angle, Type A 787616-1 AMP J8

2 2 0603 Resistor, 15K, 1/10W, 5% ERJ-3GEYJ153V Panasonic R127,R128

3 2 0603 Resistor, 15 Ohm, 1/10W, 5% ERJ-3GEYJ150V Panasonic R125,R126

4 2 0603 Capacitor, 47pF, 50V, NPO ECJ-1VC1H470J Panasonic C115,C117

5 1 0603 Capacitor, 0.1uF, 25V, XR7 ECJ-1VB1E104K Panasonic C109

6 1 Case B Capacitor, 10uF, 16V, Tantalum T491B106K016AS Kemet C111

7 1 Case C Capacitor, 100uF, 6.3V, Tantalum EEJ-L0JC107R Panasonic C113

JAN ‘05

AN255REV2

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AN255 Populating the USB Components on the EDB9301 Development Board 1. Introduction This document provides the information needed to populate the USB area of the EDB9312 board. By default, the USB components are not installed at time of PCB assembly. This document has a short Bill of Material (BOM) in Table 1 that identifies the part numbers and reference designators of the components required for USB operation. Figure 1 shows the component placement on the PCB.
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AN255 Figure 1. Component Placement R125 C115 R126 C117 C117 Revision Date 1 13 April 2004 2 Jan 2005 Changes Initial Release Changed item 7 from 100uF, 100V, XR7 to 100uF, 6.3V, Tantalum. Contacting Cirrus Logic Support For all product questions and inquiries contact a Cirrus Logic Sales Representative. To find one nearest you go to //www.cirrus.com IMPORTANT NOTICE Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable.