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PI3USB102
PI3USB102 Demo Board Rev.A User Manual
Introduction
This user manual describes the components and operation of the PI3USB102 Demo Board. USB2.0 high-speed, full-
speed and low speed signal quality measurement setup will also be described in the user guide and result for this
demo board using High Speed USB device. TDR measurement result will also be shown in this user guide.
Figure 1. Top view of PI3USB102
Pericom Semiconductor Corp.
11/5/2013
Page 1 of 19
AN
05/05/04
www.pericom.com
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Table of Contents
Summary of Contents for Pericom PI3USB102
- Page 1 PI3USB102 Demo Board Rev.A User Manual Introduction This user manual describes the components and operation of the PI3USB102 Demo Board. USB2.0 high-speed, full- speed and low speed signal quality measurement setup will also be described in the user guide and result for this demo board using High Speed USB device.
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Page 2: Board Operation
Board Operation The PI3USB102 is a single differential channel 2:1 multiplexer or demultiplexer. Figure 2 shows the logical block diagram of PI3USB102. Figure 2. Logical Block Diagram of PI3USB102 In order to choose which output the Y+/Y- connects to, two header pins are provided on the demo board for user to choose the desired signal path. - Page 3 If nOE is connected to “L” and SEL is connected to “L”, Y+/Y- will connect to M+/M-. Figure 3 shows the signal path of this connection. Hi-Z Hi-Z Figure 3. Signal path of connection to M+/M- Pericom Semiconductor Corp. 11/5/2013 Page 3 of 19 05/05/04 www.pericom.com...
- Page 4 If nOE is connected to “L” and SEL is connected to “H”, Y+/Y- will connect to M+/M-. Figure 4 shows the signal path of this connection. Hi-Z Hi-Z Figure 4. Signal path of connection to D+/D- Pericom Semiconductor Corp. 11/5/2013 Page 4 of 19 05/05/04 www.pericom.com...
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Page 5: Signal Quality Measurement
Tektronix TDS7404 is used to measure Signal Quality of PI3USB102. The USB signal from High-Speed USB device through PI3USB102 is compared with USB 2.0 High Speed UPSTREAM – NEAR END eye mask. Figure 5 shows the test setup of USB 2.0 High Speed test. - Page 6 Figure 6a and Figure 6b show the PASSING eye-diagram of which the USB 2.0 High Speed signal passing through PI3USB102. Figure 6c shows the eye-diagram of which the PI3USB102 is not used. Figure 6a. High Speed Eye-Diagram of connection to M+/M-...
- Page 7 Pass Rise Time 696.8445ps 840.6004ps 770.7400ps 143.7559ps 25.85369ps 771.1695ps Pass Fall Time 707.7780ps 843.9054ps 772.5156ps 136.1273ps 28.84574ps 773.0489ps Pass Table 3. High Speed Signal Quality Measurement of connection to D+/D- Pericom Semiconductor Corp. 11/5/2013 Page 7 of 19 05/05/04 www.pericom.com...
- Page 8 Figure 6c. High Speed Signal Quality Measurement without PI3USB102 Measurement Name Minimum Maximum Mean pk-pk Standard Deviation Population Status Monotonic Property Pass Eye Diagram Test Pass Signal Rate 473.1907Mbps 489.3789Mbps 480.0545Mbps 0.0000bps 2.961996Mbps 480.4405Mbps Pass EOP Width 16.70521ns Pass EOP Width (Bits) 8.019411...
- Page 9 The USB signal from Full-Speed USB device through PI3USB102 is compared with USB 2.0 Full Speed DOWNSTREAM – FAR END eye mask. Figure 7 shows the test setup of USB 2.0 Full Speed and Low Speed test setup. Figure 5. USB 2.0 Full Speed and Low Speed Test Setup Pericom Semiconductor Corp.
- Page 10 Additional Information : Rise Time: Min: 12.739ns Max: 15.468ns Mean: 13.801ns Std: 781.27ps RMS: 13.820ns Population: 8 Fall Time: Min: 13.362ns Max: 14.530ns Mean: 13.840ns Std: 426.35ps RMS: 13.846ns Population: 8 Pericom Semiconductor Corp. 11/5/2013 Page 10 of 19 05/05/04...
- Page 11 Additional Information : Rise Time: Min: 12.582ns Max: 13.672ns Mean: 13.161ns Std: 377.84ps RMS: 13.165ns Population: 9 Fall Time: Min: 12.117ns Max: 14.446ns Mean: 13.423ns Std: 680.41ps RMS: 13.438ns Population: 10 Pericom Semiconductor Corp. 11/5/2013 Page 11 of 19 05/05/04...
- Page 12 The USB signal from Low-Speed USB device through PI3USB102 is compared with USB 2.0 Low Speed DOWNSTREAM – NEAR END eye mask. Figure 9a and Figure 9b show the PASSING eye-diagram of which the USB 2.0 Full Speed signal passing through PI3USB102.
- Page 13 Paired JK Jitter -3.493088ns 4.884084ns 132.7189ps 8.377171ns 2.885336ns 2.740486ns Pass Paired KJ Jitter -4.197235ns 4.061412ns -92.67793ps 8.258647ns 2.620899ns 2.472745ns Pass Table 8. Low Speed Signal Quality Measurement of connection to D+/D- Pericom Semiconductor Corp. 11/5/2013 Page 13 of 19 05/05/04 www.pericom.com...
- Page 14 TDR Measurement Differential impedance of PI3USB102 on a demo board is measured to confirm the trace impedance is within the requirement described in USB 2.0 TDR Loading specification in Section 7.1.6.2. Section Reference Requirement ≤110Ω * 7.1.6.2 TDR Loading Specification Through Impedance: 70Ω≤Z...
- Page 15 Figure 10a. TDR at D+/D- of J3 Figure 10b. TDR at D+/D- of J4 Pericom Semiconductor Corp. 11/5/2013 Page 15 of 19 05/05/04 www.pericom.com...
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Page 16: Appendix A: Pcb Schematic
Appendix A: PCB Schematic Pericom Semiconductor Corp. 11/5/2013 Page 16 of 19 05/05/04 www.pericom.com... -
Page 17: Appendix B: Pcb Layout Requirements
Appendix B: PCB Layout Requirements a. Stack Up: b. Isolation Spacing = 30 mil c. Width & Spacing (W/S) of 90Ω Differential Trace = 11 / 10 mil Pericom Semiconductor Corp. 11/5/2013 Page 17 of 19 05/05/04 www.pericom.com... -
Page 18: Appendix C: Bom List
0402 10nF C2-3 Ceramic Capacitor 0805 Ceramic Capacitor 0805 4.7uF Tan Cap B-Size 22uF USB2.0 High-Speed(480Mbps) Signal Switch TQFN10 Resistor 0402 Resistor 0402 J3-4 USB Type-A Receptacle USB Type-B Receptacle Pericom Semiconductor Corp. 11/5/2013 Page 18 of 19 05/05/04 www.pericom.com... - Page 19 History Version 1.0 Original Version December 12, 2007 Version 1.1 Eye Diagram is added December 20, 2007 Pericom Semiconductor Corp. 11/5/2013 Page 19 of 19 05/05/04 www.pericom.com...