Texas Instruments OMAP5912 Reference Manual page 1578

USB OTG Controller
USB Host on USB Alternate Pin Group 2, 6-Wire USB Transceiver
286 Universal Serial Bus (USB)
Proper initialization of the OMAP5912 device to support this mode of operation
requires proper setting of the top-level pin multiplexing for pins:
-
MCSI2.DOUT/USB0.TXEN
-
UART2.TX/USB0.TXD
-
UART2.RTS/USB0.SE0
-
UART2.CTS/USB0.RCV
-
MCSI2.SYNC/USB0.SPEED
-
MCSI2.CLK/USB0.SUSP
See Table 74.
HMC_MODE must be set to a value that routes a host controller port to USB
alternate pin group 2 (see Table 73). OTG_SYSCON_1.USB0_TRX_MODE
must be set to 1 to allow proper bidirectional operation of the 4-wire USB
transceiver. OTG_SYSCON_0.USBx_SYNCHRO must be set to allow proper
bidirectional signaling
UART2.RTS/USB0.SE0.
Table 73 shows that pin group 2 can receive either of two sets of USB-related
signaling. In normal mode, pin group 2 receives the signaling associated with
the controller shown under the Port 2 column. In alternate mode, pin group 2
receives signaling associated with the controller shown under port 0.
Figure 75 shows USB host port connectivity when pin group 2 is configured
for alternate mode and connected using a 6-wire USB transceiver. When pin
group 2 is configured in alternate mode, pins USB.DP and USB.DM are not
usable for USB functionality.
on pins UART2.TX/USB0.TXD and
SPRU761A