Texas Instruments OMAP5912 Reference Manual page 1601

4.10 Other Pin Connectivity Controlled by USB Signal Multiplexing
Pin Group 1 to Pin Group 2 Internal Loopback
Figure 88. OMAP5912 Pin Group 1 to Group 2 Internal Loopback (HMC_MODE = 7)
SPRU761A
HMC_MODE must be set to a value that routes a host controller port through
the TLL (in TXVP/TXVM mode) to USB pin group 2 (see Table 73).
OTG_SYSCON_1.USB2_TRX_MODE must be set to 3 to allow proper
operation of the transceiverless link logic connection.
Figure 88 shows how the OMAP5912 internally connects the pins when
configured for HMC_MODE 7.
OMAP5912
U1
MCBSP3.CLK/USB1.TXEN
MCSI.DOUT/USB1.TXD
RTC_WAKEUP_INT/USB1.SE0
MCSI1.DIN/USB1.RCV
MCSI1.SYNC/USB1.VP
MCSI1.CLK/USB1.VM
MCSI2.DOUT/USB2.TXEN
UART2.TX/USB2.TXD
UART2.RTS/USB2.SE0
UART2.CTS/USB2.RCV
MCSI2.DIN/USB2.VP
UART2.RX/USB2.VM
Universal Serial Bus (USB)
USB OTG Controller
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