4-Port USB 2.0 Controller
Datasheet
SMSC USB20H04
Page 21
Revision 1.63 (03-30-07)
DATASHEET
8.1.2
Internal 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.
USB20H04
SCK/SCL
SD/SDA
VDD3.3
SMB_SEL_N
CS/EE_SEL
SELF_PWR
Bus/Self
Power Select
0=Bus-Power
1=Self-Power
1k
Figure 8.2 - Internal Default Mode
8.2
EEPROM 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.
