Texas Instruments OMAP5912 Reference Manual page 1567

Figure 66. USB Host Connections Using the OMAP5912 Integrated USB Transceiver
U1
USB.DP
USB.DM
GPIO
OMAP5912
SPRU761A
VBUS_ENABLE
Overcurrent
Value depends on transceiver
R1, R2
R3, R4 15K Ohm 5%
Low ESR Cap, minimum 120 µF
C1
U1 OMAP5912
U2
Transient suppressor, like SN65220, SN65240, or SN75240
U3
Power switch, like TPS2014 or TPS2015
J1 USB type-A receptacle
Proper initialization of the OMAP5912 device to support this mode of operation
requires proper setting of the top-level pin multiplexing for pins USB.DP and
USB.DM (see Table 74) and selection of an HMC_MODE value, which routes
a host controller
OTG_SYSCON_1.USB0_TRX_MODE must be set to 3 to allow proper
operation of the integrated USB transceiver.
OMAP5912 integrated pulldowns for pins USB.DP and USB.DM do not meet
the USB specifications for D+ and D− pulldowns. The external resistors shown
in Figure 66 must be implemented when using USB.DP and USB.DM for a
host connection.
R1
Transient
U2
suppressor
R2
R4
R3
VBUS
control
port to pin group
Universal Serial Bus (USB)
USB OTG Controller
J1
D+
D−
VBUS
U3
C1
0 (see Table 73).
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