Texas Instruments OMAP5912 Reference Manual page 1552

USB OTG Controller
Table 75. UHOST_EN, HMC_MODE, TLL_ATTACH, TLL_SPEED Source Selection
(Continued)
Register
Values used
4.5 Transceiver Signaling Types
USB Transceiver Unidirectional Signaling
Table 76. Signaling Between USB Controller and Unidirectional USB Transceiver
Using DAT/SE0 Signaling
Logical Sig- OMAP5912
nal Name(s) Pin Direction
OE Output
DAT and SE0 Output
260 Universal Serial Bus (USB)
Field
UHOST_EN
HMC_MODE
TLL_ATTACH
TLL_SPEED
If OTG_SYSCON_2.HMC_PADEN is 0, OTG_SYSCON_2.HMC_MODE
must be programmed with the HMC_MODE value chosen from Table 73. If
OTG_SYSCON_2.HMC_PADEN is 1, the chosen HMC_MODE value must be
written to MOD_CONF_CTRL_0.CONF_MOD_USB_HOST_HMC_
MODE_R.
When a USB or USB OTG transceiver is connected to OMAP5912 and is used
in unidirectional DAT/SE0 signaling mode, the signaling shown in Table 76 is
used.
Transceiver
Pin Direction
Input
Input
Value
Values from
OTG_
SYSCON_2
Description
When low, USB transceiver drives D+ and D-.
Controls the values output by the USB transceiver on D+
and D- when OE is low. Ignored when OE is high.
OEn DAT SE0
0 0 0
1 0
X 1
1 X X
Values from
MOD_CONF_
CTRL_0
D+ D-
0 1
1 0
0 0
Undriven Undriven
SPRU761A