EHCI controller
config
DMA
OHCI controller
1
2
3
HS root hub
1
2
3
config
DMA
TI config
Port mode mux
Port ownership
mux
Port ownership
mux
Port ownership
mux
HS host PIE
L3 interconnect
L4-Core interconnect
to USBTLL
channel
to ULPI phy
to ULPI phy
to USBTLL
channel
to USBTLL
channel
usb-029
Port mode mux
Port mode mux
60 MHz
48/12 MHz
Interface
Clock domain
FS/LS host SIE
FS/LS root hub
UTMI
ULPI
ULPI
wrapper
6 pin
6 pin
6 pin
UTMI
UTMI
ULPI
ULPI
wrapper
Public Version
www.ti.com
High-Speed USB Host Subsystem
Figure 22-31. High-Speed USB Host Controller Architecture
22.2.4.1.2 OHCI Implementation Specifications
Some features of the OHCI API are optional and/or implementation-specific. The choices made in the
current implementation, the high-speed USB host controller, are described below, and are reflected in the
register descriptions (see
, OHCI Registers). For all standard features, see the Open
Host Controller Interface (OHCI) specification for USB Release 1.0a.
•
[30:16] FSMPS field (FullSpeedMaxPacketSize) = 0x0000: Host will stop
scheduling new packets 0 bit times before the end of the frame (that is, there is no scheduling overrun
protection by default). To be updated by the software driver.
•
[7:0] NDP field (NumberDownstreamPorts) = 0x03 = 3 ports.
•
[9] NPS bit (NoPowerSwitching) = 0: Ports are power-switched by
default.
•
[8] PSM bit (PowerSwitchingMode) = 1: Per-port power switching is
supported, although PPCM default setup has all ports controlled globally (default must be = OCPM).
•
[31:24] POTPG field (PowerOnToPowerGood) = 0x0A = 10: Power
3271
SWPU177N – December 2009 – Revised November 2010
High-Speed USB Host Subsystem and High-Speed USB OTG Controller
Copyright © 2009–2010, Texas Instruments Incorporated
Содержание OMAP36 Series
Страница 174: ...174 List of Tables SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 692: ...692 MPU Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 1084: ...1084 IVA2 2 Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 1990: ...1990 2D 3D Graphics Accelerator SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2334: ...2334 Memory Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2700: ...2700 Memory Management Units SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2868: ...2868 HDQ 1 Wire SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2974: ...2974 UART IrDA CIR SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3054: ...3054 Multichannel SPI SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3462: ...3462 MMC SD SDIO Card Interface SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3508: ...3508 General Purpose Interface SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3584: ...3584 Initialization SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3648: ...3648 Debug and Emulation SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...