SMSC USB2502 Manual de usuario descargar pdf (Pagina 20)

2-Port USB 2.0 Hub Controller

Datasheet

Revision 2.3 (08-27-07) 20 SMSC USB2502

DATASHEET

5.2.3.1 EEPROM Offset 1:0(h) - Vendor ID

5.2.3.2 EEPROM Offset 3:2(h) - Product ID

Config Data

Byte 1

6 1 88 0C Configuration data byte #1 for Hub options.

Config Data

Byte 2

7 1 90 90 Configuration data byte #2 for Hub options.

Non

Removable

Device

8 1 00 00 Defines the ports that contain attached

devices (this is used only when Hub is part of

a compound device).

Port Disable

Self-Powered

9 1 00 00 Selects the ports that will be permanently

disabled

Port Disable

Bus-Powered

A 1 00 00 Selects the ports that will be permanently

disabled

Max Power

Self-Powered

B 1 01 01 Max Current for this configuration (expressed

in 2mA units).

Max Power

Bus-Powered

C 1 64 64 Max Current for this configuration (expressed

in 2mA units).

Hub Controller

Max Current

Self-Powered

D 1 01 01 Max Current (expressed in 2mA units).

Hub Controller

Max Current

Bus-Powered

E 1 64 64 Max Current (expressed in 2mA units).

Power-On

Time

F 1 32 32 Time until power is stable.

BIT

NUMBER BIT NAME DESCRIPTION

15:8 VID_MSB Most Significant Byte of the Vendor ID.

7:0 VID_LSB Least Significant Byte of the Vendor ID.

BIT

NUMBER BIT NAME DESCRIPTION

15:8 PID_MSB Most Significant Byte of the Product ID.

7:0 PID_LSB Least Significant Byte of the Product ID.

Table 5.1 User-Defined Descriptor Data (continued)

FIELD

BYTE

MSB:

LSB

SIZE

(BYTES)

DEFAULT

CFG

SELF

(HEX)

DEFAULT

CFG

BUS

(HEX) DESCRIPTION

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 43 44

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SMSC USB2502 Manual de usuario Pagina 20

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