Datasheet

Freeheadset
OMAP
(LINK)
ULPI
UART control
Phoneconnector
(USB)
ADCinputs
(optional)
Audioaccessory
USBOTGdevice
PC
Carkit
Device
USBPHY
037-011
TPS65930/TPS65920
www.ti.com SWCS037G–MAY 2008–REVISED APRIL 2011
7 USB Transceiver
7.1 USB Transceiver
The TPS65920/TPS65930 device includes a USB OTG transceiver with the CEA carkit interface that
supports USB 480 Mbps HS, 12 Mbps full-speed (FS), and USB 1.5 Mbps low-speed (LS) through a 4-pin
ULPI.
The carkit block ensures the interface between the phone and a carkit device. The TPS65920/TPS65930
USB supports the CEA carkit standard.
Figure 7-1 is a block diagram of the USB 2.0 physical layer (PHY).
Figure 7-1. USB 2.0 PHY Block Diagram
7.1.1 Features
The device has a USB OTG carkit transceiver that allows system implementation that complies with the
following specifications:
• Universal Serial Bus 2.0 Specification
• On-The-Go Supplement to the USB 2.0 Specification
• CEA-2011: OTG Transceiver Interface Specification
• CEA-936A: Mini-USB Analog Carkit Specification
• UTMI+ Low Pin Interface Specification
The features of the individual specifications are:
• Universal Serial Bus 2.0 Specification (hereafter referred to as the USB 2.0 specification):
– 5-V-tolerant data line at HS/FS, FS-only, and LS-only transmission rates
– 7-V-tolerant video bus (VBUS) line
– Integrated data line serial termination resistors (factory-trimmed)
– Integrated data line pullup and pulldown resistors
– On-chip 480-MHz phase-locked loop (PLL) from the internal system clock (19.2, 26, and 38.4 MHz)
– Synchronization (SYNC)/end-of-period (EOP) generation and checking
– Data and clock recovery from the USB stream
– Bit-stuffing/unstuffing and error detection
– Resume signaling, wakeup, and suspend detection
– USB 2.0 test modes
• On-The-Go Supplement to the USB 2.0 Specification (hereafter referred to as the OTG supplement to
the USB 2.0 specification):
– 3-pin LS/FS serial mode (DAT_SE0)
– 4-pin LS/FS serial mode (VP_VM)
• CEA-936A: Mini-USB Analog Carkit Interface Specification:
– 5-pin CEA mini-USB analog carkit interface
Copyright © 2008–2011, Texas Instruments Incorporated USB Transceiver 69
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