Texas Instruments OMAP5912 Reference Manual page 1577

USB Host on USB Alternate Pin Group 2, 4-Wire USB Transceiver
Figure 74. USB Host Connections on USB Alternate Pin Group 2 Using 4-Wire
Transceiver
U1
MCSI2.DOUT/USB0.TXEN
UART2.TX/USB0.TXD
UART2.RTS/USB0.SE0
UART2.RTS/USB0.RCV
MCSI2.SYNC/USB0.SPEED
MCSI2.CLK/USB0.SUSP
GPIO
OMAP5912
SPRU761A
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 74 shows USB host port connectivity when pin group 2 is configured
for alternate mode and connected using a 4-wire USB transceiver. When pin
group 2 is configured in alternate mode, pins USB.DP and USB.DM are not
usable for USB functionality.
OE
OE
TXDAT/RCVDAT
DAT
TXSE0/RCVSE0
SE0
RCV
RCV
SPEED
SPEED
SUSPEND
SUSPEND
VBUS_ENABLE
OVERCURRENT
R1, R2
R3, R4
C1
U1
U2
U3
U4
J1
U2
D+
D−
VDD
USB transceiver
VBUS
CONTROL
Value depends on transceiver
15K Ohm 5%
Low ESR cap, minimum 120 uF
OMAP5912
USB transceiver
Transient suppressor, like SN65220, SN65240, or SN75240
Power switch, like TPS2014 or TPS2015
USB type-A receptacle
Universal Serial Bus (USB)
USB OTG Controller
R1
Transient
U3
suppressor
R2
R3
R4
VBUS
U4
C1
J1
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