EVB-USB2517 Evaluation Board User Manual (Revision A)

Revision 1.2 (1-7-09)

2

SMSC EVB-USB2517 Revision A

USER MANUAL

1 Overview

The SMSC USB2517 is a low-power, OEM configurable, hub controller IC with 7 downstream ports for

embedded USB solutions. The USB2517 is a USB 2.0-compliant MultiTRAK™ hub that supports low-

speed, full-speed, and hi-speed downstream devices. The EVB-USB2517 evaluation board

demonstrates a stand alone application for the hub with all of the features listed below. The SMSC

evaluation board demonstrates advanced power saving options and configurable port assignments.

1.1

Features

Low pin count: 64-pin QFN package

Hi-Speed (480 Mbits/s), Full-Speed (12 Mbits/s), and Low-Speed (1.5 Mbits/s) compatible

Operates from a single voltage (+5.0 V, regulated) 'wall wart' external power supply

Low cost 4-layer design: two outer signal layers, power and ground inner layers

Self-powered operation

Multi-TT enabled

Supports internal default hub configuration (optional support configuration from external EEPROM)

Single onboard +3.3 V regulator

Single crystal clock source

Individual port over-current sensing

Individual port power control

Port OCS/port power control interface with LEDs for optional port power indication

Red LED indicator for Hi-Speed hub state

Standard USB amber/green LED indicators for operational state indication

EMI suppression provided by selection of capacitors and inner power/ground PCB layers

1.2

General Description

The EVB-USB2517 is a low-cost evaluation platform featuring the USB2517 7-port, low-power, hi-

speed USB 2.0 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. The EVB-USB2517 is designed with efficient power usage for the implementation of a hi-speed

USB hub with minimal bill-of-materials. Schematics, layout, and bill-of-materials are included to

minimize new product development time.

Revision A of the EVB-USB2517 features a four-layer printed circuit board to improve coupling

between power and ground layers to reduce EMI.