4-Port USB 2.0 Controller

Datasheet

8.1.2Internal Default Configuration

The internal default configuration is enabled when SMB_SEL_N is high and CS/EE_SEL is low on the rising edge of RESET_N. If SELF_PWR is low, then the bus-powered default settings are loaded.

Bus/Self

PowerSelect 0=Bus-Power 1=Self-Power

VDD3.3

USB20H04

SMB_SEL_NSCK/SCL

CS/EE_SELSD/SDA

SELF_PWR

1k

Figure 8.2 - Internal Default Mode

8.2EEPROM Programming Values

Configuration data is loaded from an external EEPROM following reset. The values to be programmed into the EEPROM are summarized in Table 8.1 - Summary of OEM Value Programming.

Table 8.1 - Summary of OEM Value Programming

ADDRESS

FIELD NAME

DESCRIPTION

0

VID (MSB)

Vendor ID (assigned by USB-IF).

1

VID (LSB)

 

2

PID (MSB)

Product ID (assigned by Manufacturer).

3

PID (LSB)

 

4

DID (MSB)

Device ID (assigned by Manufacturer).

5

DID (LSB)

 

6

Config_Byte_3

Configuration options defined in Table 8.2.

7

Config_Byte_2

Configuration options defined in Table 8.3.

8

Config_Byte_1

Configuration options defined in Table 8.4.

9

Max_Power

Maximum current for this configuration, see Table 8.5.

10

HubContrCurrent

Maximum current for the USB20H04, see Table 8.5.

11

PwrOn2PwrGood

Time until power is stable, see Table 8.5.

SMSC USB20H04

Page 21

Revision 1.63 (03-30-07)

DATASHEET