USB3500-ABZJ Standard Microsystems (SMSC), USB3500-ABZJ Datasheet - Page 28

• Manufacturer Part Number: USB3500-ABZJ
• Manufacturer: Standard Microsystems (SMSC)

Specifications of USB3500-ABZJ

• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Package Type: QFN
• Rad Hardened: No
• Lead Free Status / Rohs Status: Compliant

Revision 1.0 (06-05-08)
6.6.2
6.7
USB On-The-Go (OTG) Module
VDD33
Power On Reset (POR)
The USB3500 provides an internal POR circuit that generates a reset pulse once the PHY supplies
are stable. The UTMI+ Digital can be reset at any time with the RESET pin.
The USB3500 provides support for USB OTG. This mode allows the USB3500 to be dynamically
configured as a host or a device depending on the type of cable inserted into the Mini-AB connector.
When the Mini-A plug of a cable is inserted into the Mini-AB connector the USB device becomes the
A-device. When a Mini-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 OTG supplement.
The OTG Module meets all the requirements 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.
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.
VBUS
ID
Figure 6.8 USB3500 On-the-Go Module
OTG Module
DATASHEET
4.575V
0.5V
1.4V
28
Hi-Speed USB Host, Device or OTG PHY With UTMI+ Interface
0.6V
IDPULLUP
ID_DIG
SESSEND
CHRGVBUS
SESSVLD
VBUSVLD
DISCHRGVBUS
SMSC USB3500
Datasheet