Microchip USB82514 Bedienungsanleitung
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USB82514
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Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for
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SMSC EVB-USB82514Q36-BAS Revision 1.1 (07-13-11)
USER MANUAL
EVB-USB82514Q36-BAS 36-Pin QFN
Evaluation Board User Manual (Revision C)
EVB-USB82514Q36-BAS 36-Pin QFN Evaluation Board User Manual (Revision C)
Revision 1.1 (07-13-11) 2 SMSC EVB-USB82514Q36-BAS
USER MANUAL
1 Overview
The SMSC Automotive Grade USB 2.0 4-Port Hub is designed, fabricated, tested, characterized and
qualified for automotive applications. The USB82514 MultiTRAK™ is a low-power, OEM configurable,
full featured Hi-Speed USB 2.0 compliant hub contnroller IC with four down-stream ports for embedded
USB solutions. The EVB-USB82514Q36-Bas 36-Pin QFN Evaluation Board demonstrates a stand
alone application for the hub with all the features listed below and demonstrates the advanced power
saving options and configurable port assignments.
1.1 Features
Low pin count USB82514 36 - pin QFN package
Hi-Speed (480 Mbits/s), Full-Speed (12 Mbits/s), and Low-Speed (1.5 Mbits/s) compatible
Operation from a single voltage (+5.0 VDC, regulated) 'wall wart' external power supply
Low cost 4-layer design: two outer signal layers
- power inner layers
- ground inner layers
Optional pull-up resistors for disabling individual downstream ports
Self-powered operation
Multi-transaction translator enabled
Support of internal default hub configuration
Single onboard +3.3 VDC regulator
Single crystal clock sourc
Individual port over-current sensing
Individual port power control
Port over-current sensing (OCS)/port power control interface with LEDs for port power indication
Red LED indicator for active hub state (not suspend)
EMI suppression provided by ferrite beads, selection of capacitors, and internal power/ground
layers.
ESD protection up to 25 kV direct contact to USB signals provided with diode bridges and common
mode chokes.
1.2 General Description
The EVB-USB82514Q36-BAS is a demonstration and low-cost evaluation platform featuring the
USB82514 4-port, low-power Hi-Speed USB2.0 Hub with MultiTRAK technology. The platform is
designed to robustly demonstrate the unique features of this device using a low-cost PCB
implementation with individual port power control. TheEVB-USB82514Q36-BAS is designed for low
cost, power efficient implementation of a Hi-Speed USB Hub with minimal bill of materials. Schematics,
layout, and bill of materials are included minimizing the customers new product development time.
Revision C of the EVB-USB82514Q36-BAS has a four-layer printed circuit board to improve coupling
between power and ground to reduce EMI. Ferrite beads have been added on all connector ground
and power nets. Protective diode bridges and common mode chokes were added to all USB signals.
Figure 2.1 and Figure 2.2 show the top and bottom level silk screen and copper layers.
Produktspezifikationen
| Marke: | Microchip |
| Kategorie: | Nicht kategorisiert |
| Modell: | USB82514 |
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