LPC47M14X datasheet(170/205 Pages) SMSC

170 / 205 page

SMSC DS – LPC47M14X

Page 170

Rev. 03/19/2001

NAME

REG INDEX

DEFINITION

NOTES

IdVendor_Low

Default=0x24

on VTR POR

0xF1

R/W

Bit[7:0] USB Vendor ID (assigned by USB), low byte

Default reset to SMSC ID

System

Note 1

IdVendor_High

Default=0x04

on VTR POR

0xF2

R/W

Bit[7:0] USB Vendor ID (assigned by USB), high byte

Default reset to SMSC ID

System

Note 1

IdProduct_Low

Default=40

on VTR POR

0xF3

R/W

Bit[7:0] USB Product ID (assigned by manufacturer), low

byte

Default reset to SMSC silicon ID

System

Note 1

IdProduct_High

Default=01

on VTR POR

0xF4

R/W

Bit[7:0] USB Product ID (assigned by manufacturer),

high byte

Default reset to SMSC silicon ID

System

Note 1

BcdDevice_Low

Default=0x00

on VTR POR

0xF5

R/W

Bit[7:0] USB Device Release Number (in binary coded

decimal), low byte

Default set to SMSC silicon revision

System

Note 1

BcdDevice_High

Default=0x00

on VTR POR

0xF6

R/W

Bit[7:0] USB Device Release Number (in binary coded

decimal), high byte

Default set to SMSC silicon revision

System

Note 1

HubControl_1

Default=0x00

on VTR POR

0xF7

R/W

Bit[0] GangedPWR

Bit[1:4] Reserved

Bit[5:6] Strp[0:1]

Bit[7] NhubReset

Note: For a detailed description of HubControl_1 bits

see Table 76 below.

0xF8-

0xFF

Reserved – read as ‘0’

Note 1: This activate function is satisfied by NHubReset in the HubControl 1 Register defined below.

System Note 1: Current Root Hub device identification is being implemented by using the Vendor ID (VID)

and Product ID (PID) from the hub vendor. Although this is not currently a Windows 2000 or 98 logo

requirement, Microsoft WHQL encourages system vendors to change the VID/PID combination for each of

their motherboards and USB hubs. Using the hub vendor's VID/PID (Default Value of the registers defined

above) combination becomes an issue if, in a future operating system release, WHQL finds a broken

implementation in the industry that must be disallowed. As result, all hubs using the same VID/PID

combination would be disallowed by the operating system. However, if each system vendor creates a

unique VID/PID combination, then only the disallowed implementation would be turned off.

Therefore, it is recommended that each OEM modify / change the following register values, through BIOS,

for each motherboard design by modifying the following registers defined above:

IdVendor_Low Default=0x24

IdVendor_High Default=0x04

IdProduct_Low Default=0x40

IdProduct_High Default=0x01

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