EVB-USB82514 Datasheet EVB-USB82514 | P1-P3

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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.

EVB-USB82514Q36-BAS 36-Pin QFN Evaluation Board User Manual (Revision C)

SMSC EVB-USB82514Q36-BAS 3 Revision 1.1 (07-13-11)

USER MANUAL

2 Hardware Configuration

2.1 Hardware Description

The EVB-USB82514Q36-BAS has one onboard regulator, which generates +3.3 VDC from a +5.0 VDC

power supply. An additional U7 footprint

corresponds to the automotive temperature range with a

larger package and has ties into the ground plane for better thermal dissipation. The USB82514

generates its own on-chip +1.8 VDC supply. The USB82514 Hub consumes power from the +3.3 VDC

supply while the Micrel

Dual-Channel Power Distribution Switch (MIC2026) consumes power from the

+5.0 VDC supply. The MIC2026 Power Distribution Switch supplies downstream power to each

attached device.

2.1.1 Port Assignment

Downstream ports are numbered 1 through 4 with individual port power controllers. The port power

controllers provide 5 Volt power with over-current protection to the downstream devices. Upstream and

downstream port connectors have USB 2.0 compliant decoupling, filtering for EMI on signal ground

and power, and a separate shield ground. ESD protection for USB signals is provided by diode bridges

and common mode chokes. This feature provides protection up to 25 kV direct contact to USB signals.

Optional pull-up resistors can be placed to disable a USB port. Please refer to the EVB-

USB82514Q36-BAS schematics on our web site http://www.smsc-ais.com

for implementation.

2.1.2 HUB Configuration

The EVB-USB82514Q36-BAS has been configured to support internal default configuration with

strapping options enabled as determined by the state of CFG_SEL[1] and CFG_SEL[0] pins

immediately after reset. The internal +1.8 VDC regulator supplies voltage to the oscillator and PLL is

turned off during suspend to minimize suspend current.

2.1.3 Powered State LED

An optional LED (LED5) indicates when +5.0 VDC power is present.

2.1.4 Active State LED

An optional LED (LED6) indicates when the hub is active (configured and not suspended).

2.1.5 Port Power LEDs

LED1, LED2, LED3, and LED4 indicate when port power is available to the associated downstream

USB port.

1.This part is located on the bottom side of the board (see Figure 2.2 on page 6) and is populated for the au-

tomotive USB configuration. Note, when U7 is populated, the default onboard 3.3 V regulator U5 should be

depopulated. Refer to the bill of materials for more details about U7 footprint.

P1-P3 P4-P6 P7-P7

EVB-USB82514

Mfr. #:

Buy EVB-USB82514

Manufacturer:

Description:

BOARD EVAL USB82514 AUTO GRADE

Lifecycle:

New from this manufacturer.

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Products related to this Datasheet

EVB-USB82514