USB2534 datasheet(27/52 Pages) MICROCHIP

27 / 52 page

USB 2.0 Hi-Speed 4-Port Hub Controller

Datasheet

 2014 Microchip Technology Inc.

DS00001713A-page 27

Chapter 6 Device Configuration

The device supports a large number of features (some mutually exclusive), and must be configured in

order to correctly function when attached to a USB host controller. The hub can be configured either

internally or externally depending on the implemented interface.

Microchip provides a comprehensive software programming tool, Pro-Touch, for configuring the

USB2534 functions, registers and OTP memory. All configuration is to be performed via the Pro-Touch

programming tool. For additional information on the Pro-Touch programming tool, contact your local

Microchip sales representative.

6.1

Configuration Method Selection

The CFG_SEL[1:0] configuration straps and the SDA pin are used to determine the hub configuration

method, as shown in Table 6.1. The software reads the SDA pin and the CFG_SEL[1:0] bits and

configures the system appropriately.

Note: Refer to Chapter 7, "Device Interfaces," on page 32 for detailed information on each device

configuration interface.

6.2

Customer Accessible Functions

The following USB or SMBus accessible functions are available to the customer via the Pro-Touch

Programming Tool.

Note: For additional programming details, refer to the Pro-Touch Programming Tool User Manual.

Table 6.1 Hub Configuration Selection

SDA

CFG_SEL1

CFG_SEL0

DESCRIPTION

Configuration is based on the configuration strap options and

internal OTP settings. This configuration sets the device Self

powered operation.

Invalid

Configuration based on the configuration strap options and

internal OTP settings. This configuration sets the device for Bus

powered operation.

Firmware performs a configuration load from 2-wire (I2C)

EEPROM. The device does not perform an SMBus Master

detection. Configuration is controlled by EEPROM values and

OTP settings. Strap options are disabled.

Firmware must wait for configuration from an SMBus Master.

Configuration is controlled by SMBus Master and OTP settings.

Strap options are disabled.

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