Datasheet
Table Of Contents
- 1.0 Introduction
- 2.0 USB3320 Pin Locations and Definitions
- 3.0 Limiting Values
- 4.0 Electrical Characteristics
- 4.1 Operating Current
- 4.2 Clock Specifications
- 4.3 ULPI Interface Timing
- 4.4 Digital IO Pins
- 4.5 DC Characteristics: Analog I/O Pins
- 4.6 Dynamic Characteristics: Analog I/O Pins
- 4.7 OTG Electrical Characteristics
- 4.8 USB Audio Switch Characteristics
- 4.9 Regulator Output Voltages and Capacitor Requirement
- 4.10 Piezoelectric Resonator for Internal Oscillator
- 5.0 Architecture Overview
- FIGURE 5-1: USB3320 Internal Block Diagram
- 5.1 ULPI Digital Operation and Interface
- 5.2 USB 2.0 Hi-Speed Transceiver
- 5.3 Bias Generator
- 5.4 Integrated Low Jitter PLL
- 5.5 Internal Regulators and POR
- 5.6 USB On-The-Go (OTG)
- 5.7 USB UART Support
- 5.8 USB Charger Detection Support
- 5.9 USB Audio Support
- 5.10 Reference Frequency Selection
- 6.0 ULPI Operation
- 6.1 Overview
- 6.2 ULPI Register Access
- 6.3 Low Power Mode
- 6.4 Full Speed/Low Speed Serial Modes
- 6.5 Carkit Mode
- 6.6 RID Converter Operation
- 6.7 Headset Audio Mode
- 7.0 ULPI Register Map
- 8.0 Application Notes
- 8.1 Application Diagram
- TABLE 8-1: Component Values in Application Diagrams
- TABLE 8-2: Capacitance Values at VBUS of USB Connector
- FIGURE 8-1: USB3320 Application Diagram (Device, ULPI Output Clock mode, 24MHz)
- FIGURE 8-2: USB3320 Application Diagram (Device, ULPI Input Clock mode, 60MHz)
- FIGURE 8-3: USB3320 Application Diagram (Host or OTG, ULPI Output Clock Mode, 24MHz)
- 8.2 Reference Designs
- 8.3 ESD Performance
- 8.1 Application Diagram
- 9.0 Package Information
- Appendix A: Data Sheet Revision History
- The Microchip Web Site
- Customer Change Notification Service
- Customer Support
- Product Identification System
- Worldwide Sales and Service
USB3320
DS00001792E-page 48 2014-2016 Microchip Technology Inc.
After the USB3320 has detected the change of state on the ID pin, the RID converter can be used to determine the value
of ID resistance. To start a ID resistance measurement, the RidConversionStart bit is set in the Vendor Rid Conversion
register.
The Link can use one of two methods to determine when the RID Conversion is complete. One method is polling the
RidConversionStart bit as described in Section 7.1.3.3. The preferred method is to set the RidIntEn bit in the Vendor Rid
Conversion register. When RidIntEn is set, an RXCMD will be generated after the RID conversion is complete. As
described in Table 6-3, the alt_int bit of the RXCMD will be set.
After the RID Conversion is complete, the Link can read RidValue from the Vendor Rid Conversion register.
6.7 Headset Audio Mode
This mode is designed to allow a user to view the status of several signals while using an analog audio headset with a
USB connector. This feature, exclusive to Microchip, is provided as an alternate mode to the CarKit Mode defined in
Section 6.5. In the CarKit Mode, the Link is unable to view the source of the interrupt on ID, except by returning to syn-
chronous mode to read the ULPI registers. This forces the audio switches to be deactivated, and may glitch the audio
signals. In addition, the Link cannot change the resistance on the ID pin without starting up the PHY to access the ULPI
registers.
The Headset Audio Mode is entered by writing to the Headset Audio Mode register, and allows the Link access to the
state of the VBUS and ID pins during audio without glitching the audio connection. The Headset Audio mode also
enables the Link to change the resistance on the ID pin and to change the audio headset attached from mono to stereo.
The ULPI interface is redefined as shown in Table 6-10 when Headset Audio Mode is entered.
Exiting Headset Audio Mode is the same as exiting Low Power Mode as described in Section 6.3.2. The Link must
assert STP to signal the PHY to exit. When the PHY can accept a command, DIR is de-asserted and the PHY will wait
until the Link de-asserts STP to resume synchronous ULPI operation. The RESETB pin can also be pulsed low to reset
the USB3320 and return it to Synchronous Mode.
TABLE 6-10: PIN DEFINITIONS IN HEADSET AUDIO MODE
Signal Connected To Direction Description
SessVld DATA[0] OUT Output of SessVld comparator
VbusVld DATA[1] OUT Output of VbusVld Comparator (interrupt must be enabled)
IdGndDrv DATA[2] IN Drives ID pin to ground when asserted
0b: Not connected
1b: Connects ID to ground.
DATA[3] OUT Driven low
IdGround DATA[4] OUT Asserted when the ID pin is grounded.
0b: ID pin is grounded
1b: ID pin is floating
IdFloat DATA[5] OUT Asserted when the ID pin is floating. IdPullup or d_pullup330
must be enabled as shown below.
IdPullup330 DATA[6] IN When enabled a 330kΩpullup is applied to the ID pin. This
bit will also change the trip point of the IdGnd comparator to
the value shown in Ta bl e 4- 7.
0b: Disables the pull-up resistor
1b: Enables the pull-up resistor
IdPullup DATA[7] IN Connects the 100kΩ pull-up resistor from the ID pin to
VDD3.3
0b: Disables the pull-up resistor
1b: Enables the pull-up resistor