USB3320C-EZK Standard Microsystems (SMSC), USB3320C-EZK Datasheet - Page 33

• Manufacturer Part Number: USB3320C-EZK
• Description: USB PHY
• Manufacturer: Standard Microsystems (SMSC)

Specifications of USB3320C-EZK

• Lead Free Status / RoHS Status: Compliant

Highly Integrated Full Featured Hi-Speed USB 2.0 ULPI Transceiver
Datasheet
SMSC USB3320
5.6
5.6.1
DATA[7:0]
RESETB
REFCLK
STP
DIR
The USB3320 provides full support for USB OTG protocol. OTG allows the USB3320 to be dynamically
configured as a host or device depending on the type of cable inserted into the receptacle. When the
Micro-A plug of a cable is inserted into the Micro-AB receptacle, the USB device becomes the A-
device. When a Micro-B plug is inserted, the device becomes the B-device. The OTG A-device
behaves similar to a Host while the B-device behaves similar to a peripheral. The differences are
covered in the “On-The-Go Supplement to the USB 2.0 Specification”. In applications where only Host
or Device is required, the OTG Module is unused.
ID Resistor Detection
The ID pin of the USB connector is monitored by the ID pin of the USB3320 to detect the attachment
of different types of USB devices and cables. For device only applications that do not use the ID signal
the ID pin should be connected to VDD33. The block diagram of the ID detection circuitry is shown in
Figure 5.10
USB On-The-Go (OTG)
T0
SUPPLIES
STABLE
PHY Tri-States
PHY Tri-States
and the related parameters are given in
Figure 5.9 ULPI Start-up Timing
T1
DATASHEET
33
PHY Drives High
PHY Drives Idle
REFCLK valid
T
START
Table
4.7.
T2
IDLE
LINK Drives Low
Revision 1.0 (07-14-09)
RXCMD
IDLE