Texas Instruments OMAP5912 Reference Manual page 1599

USB Device With Transceiverless Link Logic (TXD/TXSE0)
Figure 86. OMAP5912 as USB Device Controller on Transceiverless Link Using
TXD/TXSE0 Signaling
U1
MCSI2.DOUT/USB2.TXEN
UART2.TX/USB2.TXD
UART2.RTS/USB2.SE0
UART2.CTS/USB2.RCV
MCSI2.DIN/USB2.VP
UART2.RX/USB2.VM
This device acts as the USB
device on the transceiverless
link
OMAP5912
SPRU761A
Figure 86 shows connectivity when OMAP5912 acts as the USB device on a
transceiverless link connection to an on-board USB host controller.
RCVVM
Proper initialization of the OMAP5912 device to support this mode of operation
requires proper setting of the top-level pin multiplexing for these pins:
-
MCSI2.DOUT/USB2.TXEN
-
UART2.TX/USB2.TXD
-
UART2.RTS/USB2.SE0
-
UART2.CTS/USB2.RCV
-
MCSI2.DIN/USB2.VP
-
UART2.RX/USB2.VM
See Table 74.
HMC_MODE must be set to a value that routes the USB device controller
through the TLL (in TXD/TXSE0 mode) to USB pin group 2 (see Table 73).
RCV
RCV
RCVVM
RCVVP
RCVVP
TXOE
TXOE
TXSE0
TXSE0
TXD
TXD
USB host
Universal Serial Bus (USB)
USB OTG Controller
U2
OMAP5912 acts as the
USB host
on the transceiverless link
307