Selecting and configuring
HS USB Host subsystem
connectivity
Serial interface selection
Serial PHY
(transceiver)
interfaces
Serial TLL
interfaces
4 modes :
6-pin DAT/SE0
6-pin DP/DM
4-pin DP/DM
3-pin DAT/SE0
6 modes :
6-pin DAT/SE0
6-pin DP/DM
4-pin DP/DM
3-pin DAT/SE0
2-pin DAT/SE0
2-pin DP/DM
Ports : i (mmi)
1 mode : 12-pin/8-bit data SDR
Ports : i (mmi)
Full- and low-speed transactions
High-speed operation
Pi_ULPI_BYPASS bit = 0
Pi_ULPI_BYPASS bit = 1
TLL_CHANNEL_CONF_i[2:1]
CHANMODE field = 0x0
TLL_CHANNEL_CONF_i[2:1]
CHANMODE field = 0x1
TLL_CHANNEL_CONF_i[8]
ULPIDDRMODE bit = 0x1
TLL_CHANNEL_CONF_i[8]
ULPIDDRMODE bit = 0x0
Use of HS USB Host controller UTMI port i
(HS USB Host controller coupled with USBTLL)
Use of HS USB Host controller ULPI port i
(USBTLL is bypassed)
ULPI TLL interface selection
ULPI PHY (transceiver) interface selection
Ports : i (hsusbi_tll)
1 mode :
8-pin/4-bit data DDR
Ports : i (hsusbi_tll)
1 mode :
12-pin/8-bit data SDR
Ports : i (hsusbi)
usb-034
i = 1, 2 or 3
TLL_CHANNEL_CONF_i[27:24]
FSLSMODE field
Public Version
www.ti.com
High-Speed USB Host Subsystem
Table 22-51. USBTLL Registers Impacted by the SAR Context (continued)
Register Name
Comments on SAR Policy
-
-
22.2.5 High-Speed USB Host Subsystem Basic Programming Model
22.2.5.1 Selecting and Configuring USB Connectivity
Perform the following steps to select the desired USB connectivity and configure the device accordingly.
The high-speed USB host subsystem provides three kinds of interfaces for connection:
•
ULPI PHY interfaces for high-speed data transactions (up to 480 Mbps)
•
Serial interfaces for full- and low-speed data transactions (up to 12 Mbps)
•
ULPI TLL interfaces for high-speed data transactions (up to 480 Mbps)
shows how to select and configure the high-speed USB host subsystem connectivity.
Figure 22-34. Selecting and Configuring High-Speed USB Host Subsystem Connectivity
3281
SWPU177N – December 2009 – Revised November 2010
High-Speed USB Host Subsystem and High-Speed USB OTG Controller
Copyright © 2009–2010, Texas Instruments Incorporated