Texas Instruments OMAP5912 Reference Manual page 487

Configuration
Table 36. Module Configuration Control 0 Register (MOD_CONF_CTRL_0)
(Continued)
Bit Name
7 CONF_MOD_USB_HOST_
HMC_TLL_ATTACH_R
6:1 CONF_MOD_USB_HOST_
HMC_MODE_R
0 CONF_MOD_USB_HOST_
EXTCLKENI_R
Notes: 1) This function has been removed. Writing a 1 or a 0 to this register is acceptable. However, it is recommended
to write a 0, in case functions are added to this register space in the future.
70 Initialization
Base Address = 0xFFFE 1000, Offset Address = 0x80
Function
Transceiverless link logic (TLL) USB attach
control. For HMC modes (as defined by
HMC_MODE_I and HMC_JTAG_EN_I) where
the TLL is used, this bit determines whether or
not the TLL models its internal representation of
USB differential data signals with or without a
pullup when neither the internal USB host nor
the external USB device is attempting to drive
the signals. This signal is ignored when either
device is driving USB data.
0: When neither the USB host nor the external
USB device attempts to drive, no pullup is
modeled. The associated USB host port
interprets this as no device attached.
1: When neither the USB host nor the external
USB device attempts to drive, a pullup is
modeled on either the internal representation of
D+ or D−. The associated USB host port
interprets this as an attached device with the
bus in an idle condition.
USB_HHC port multiplexing control. This resets
to the following configuration.
000000b: USB port 0 is controlled by the
USB_W2FC, and USB ports 1 and 2 are held in
benign states.
See Note 1.
R/W Reset
R/W 0x0
R/W 0x0
R/W 0x0
SPRU752B