Device
usb−015
mm1_rxrcv
mm1_txdat
mm1_txse0
mm1_rxdp
mm1_rxdm
mm1_txen_n
SE0/DM
DAT/DP
TXEN
RCV
VBUS
D+
D−
ID
Mini AB
USB
receptacle
mm2_rxrcv
mm2_txdat
mm2_txse0
mm2_rxdp
mm2_rxdm
mm2_txen_n
mm3_rxrcv
mm3_txdat
mm3_txse0
mm3_rxdp
mm3_rxdm
mm3_txen_n
High-Speed
USB host
subsystem
SE0
DAT
TXEN
SE0/DM
DAT/DP
TXEN
RCV
VBUS
D+
D−
ID
Mini AB
USB
receptacle
FS/LS
USB
transceiver
FS/LS
USB
transceiver
FS/LS
USB peripheral
controller
3-pin bidirectional
(Tx=DAT/SE0)
Public Version
High-Speed USB Host Subsystem
www.ti.com
Figure 22-17. High-Speed USB Host Subsystem Typical Application System
The high-speed USB host controller is coupled with the USBTLL module to compose the serial interface
modes. The USBTLL module translates the parallel, synchronous UTMI+ (Level 3) protocol to a serial,
asynchronous one. The benefit of the conversion is a simplified interface to the transceiver.
CAUTION
Only full- and low-speed data transactions are possible in serial mode.
Transceiver interface is serial (its frequency is that of the actual USB line) and
combinatorial (no clock is passed).
3246
High-Speed USB Host Subsystem and High-Speed USB OTG Controller
SWPU177N – December 2009 – Revised November 2010
Copyright © 2009–2010, Texas Instruments Incorporated