USB4640 datasheet(9/64 Pages) SMSC

9 / 64 page

High Speed Inter-Chip (HSIC) USB 2.0 Hub and Flash Media Controller

Datasheet

SMSC USB4640/USB4640i

Revision 1.0 (06-09-09)

DATASHEET

OEM Selectable Hub Features

A default configuration is available in the USB4640/USB4640i following a reset. The

USB4640/USB4640i may also be configured by an external I2C EEPROM or via external SPI ROM

flash.

Compound Device support on a port-by-port basis

- a port is permanently hardwired to a downstream USB peripheral device

Select over-current sensing and port power control on an individual or ganged (all ports together)

basis to match the OEM’s choice of circuit board component selection

Port power control and over-current detection/delay features

Configure the delay time for filtering the over-current sense inputs

Configure the delay time for turning on downstream port power

Bus- or self-powered selection

Hub port disable or non-removable configurations

Flexible port mapping and disable sequencing supports multiple platform designs

Programmable USB differential-pair pin location eases PCB layout by aligning USB signal lines

directly to connectors

Programmable USB signal drive strength recovers USB signal integrity using 4 levels of signal drive

strength

Indicate the maximum current that the 2-port hub consumes

Indicate the maximum current required for the hub controller

USB4640 Datenblatt(PDF) 9 Page - SMSC Corporation