USB 2.0 7-Port Hub

Data Sheet Rev. 1.01

EEPROM CONTENTS

Address

Contents

Note

0x00

0x40

Constant, low byte of check code

0x01

0x1A

Constant, high byte of check code

0x02

Vendor ID (Low)

Low byte of Vendor ID, idVendor field of Standard Device Descriptor

0x03

Vendor ID (High)

High byte of Vendor ID, idVendor field of Standard Device Descriptor

0x04

Product ID (Low)

Low byte of Product ID, idProduct field of Standard Device Descriptor

0x05

Product ID (High)

High Byte of Product ID, idProduct field of Standard Device Descriptor

0x06

Device Release (Low)

Low byte of Device Release Number, must be Binary Coded Decimal,

bcdDevice field of Standard Device Descriptor

0x07

Device Release (High)

High byte of Device Release Number, must be Binary Coded Decimal,

bcdDevice field of Standard Device Descriptor

0x08 ~

0x17

Device Serial Number

Device's Serial Number – the contents of string descriptor describing the

device's serial number.

0x18

Length of Serial Number Length of effective “Device Serial Number” stored in 0x08 to 0x17.

0x19

Filling

0x00

0x1A

Port Number

Number of Downstream Ports, bNbrPorts field of Hub Descriptor.

0x1B

Filling

0x00

0x1C

Device Removable

DeviceRemovable field of Hub Descriptor –

Indicates if a port has a removable device attached. If bit N is set to 1, then

the device on downstream facing port N is non-removable. Otherwise, it is

removable. Bit 0 is reserved and should be 0.

0x1D

Filling

0x00

0x1E

Device Attributes

Bit 0: Port Indicators Support, bit 7 of wHubCharacteristics field of Hub

Descriptor –

0: Port Indicators are not supported on its downstream facing ports

and PORT_INDICATOR request has no effect.

1: Port Indicators are supported on its downstream facing ports and

PORT_INDICATOR request controls the indicators.

Bit 1: Identifies a Compound Device, bit 2 of wHubCharacteristics field of

Hub Descriptor –

0: Hub is not part of a compound device.

1: Hub is part of a compound device.

Bit 2: Maximum current requirements of the Hub Controller electronics,

bHubContrCurrent field of Hub Descriptor –

0: 200mA.

1: 500mA.

Bit 3 to 7, reserved, must be 0's.

0x1F

Check Sum

The 8-bit sum of all value from 0x00 to 0x1E.

Jul. 16, 2009

Subject to Change Without Notice

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