USB3503 datasheet(42/73 Pages) MICROCHIP

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USB3503

DS00001584B-page 42

 2011-2015 Microchip Technology Inc.

7.3.2

CONFIGURATION DESCRIPTOR

The following table provides configuration descriptor values for High-Speed operation.

Device

user

Device ID; Customer value defined in ROM or serial port

load.

Manufacturer

xxh

If STRING_EN =0 Optional string is not supported, and xx

= 00.

If STRING_EN = 1, String support is enabled, and

xx = 01

Product

yyh

If STRING_EN =0 Optional string is not supported, and yy

= 00.

If STRING_EN = 1, String support is enabled, and

yy = 02

SerialNumber

zzh

If STRING_EN =0 Optional string is not supported, and zz

= 00.

If STRING_EN = 1, String support is enabled, and

zz = 03

NumConfigurations

01h

Supports 1 configuration.

TABLE 7-6:

CONFIGURATION DESCRIPTOR (HIGH-SPEED)

Offset

Field

Size

Value

Description

Length

09h

Size of this Descriptor.

DescriptorType

02h

Configuration Descriptor Type.

TotalLength

yyyyh

Total combined length of all descriptors for this

configuration (configuration, interface, endpoint, and

class- or vendor-specific).

yyyyh = 0029h.

NumInterfaces

01h

Number of Interface supported by this configuration.

ConfigurationValue

01H

Value to use as an argument to the SetConfiguration()

request to select this configuration.

Configuration

00h

Index of string descriptor describing this configuration

(String not supported).

Attributes

user/

signal

Configuration characteristics: Communicates the

capabilities of the hub regarding Remote Wake-up

capability, and also reports the self-power status. In all

cases, the value reported to the host always indicates

that the hub supports Remote Wakeup.

The value reported to the host is dependant upon the

SELF_BUS_PWR bit (CONFIG_BYTE_1)

= A0h for Bus-Powered (SELF_BUS_PWR = 0).

= E0h for Self-Powered (SELF_BUS_PWR = 1).

All other values are reserved.

TABLE 7-5:

DEVICE DESCRIPTOR (HIGH-SPEED) (CONTINUED)

Offset

Field

Size

Value

Description

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