USB3300_06 SMSC [SMSC Corporation], USB3300_06 Datasheet - Page 42

• Manufacturer Part Number: USB3300_06
• Description: Hi-Speed USB Host, Device or OTG PHY with ULPI Low Pin Interface
• Manufacturer: SMSC [SMSC Corporation]

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Revision 1.06 (07-19-06)
6.5.1
EXTVBUS
USB PLUG
VDD33
VBUS
CPEN
A
B
The OTG Module can be broken into 4 main blocks; ID Detection, VBUS Control, Driving External
Vbus, and External Vbus Detection. Each of these blocks is covered in the sections below.
ID Detection
The USB3300 provides an ID pin to determine the type of USB cable connected. When the Mini-A
Plug of a USB cable is inserted into the Mini-AB connector, the ID pin is shorted to ground. When the
Mini-B Plug is inserted into the Mini-AB connector, the ID pin is allowed to float.
The USB3300 provides an integrated pull-up resistor and a comparator to detect if the ID pin is floating
or grounded. An integrated pull-up resistor is provided to pull the ID pin high to VDD3.3 when a Mini-
B plug is inserted and the cable is floating. When a Mini-A plug is connected, the pull-up resistor will
ID
IndicatorComplement
PERIPHERAL
[UseExternalVbusindicator, IndicatorPassThru]
Figure 6.10 USB3300 On-the-Go Module
OTG ROLE
Table 6.9 IdGnd vs. USB Cable Type
HOST
IdPullup
ChrgVbus
DischrgVbus
DATASHEET
OTG Module
0.6V
Hi-Speed USB Host, Device or OTG PHY with ULPI Low Pin Interface
42
4.575V
ID VOLTAGE
0.5V
1.4V
3.3
[0, X]
[1, 0]
[1, 1]
0
IdGnd
SessEnd
SessValid
VbusValid
RXCMD VbusValid
DrvVbus
DrvVbusExternal
IDGND
0
1
SMSC USB3300
Datasheet