Texas Instruments OMAP5912 Reference Manual page 1582

USB OTG Controller
Pin Group 1 USB Device Using 3-Wire USB Transceiver
Figure 77. USB Device Connections on USB Pin Group 1 Using 3-Wire Transceiver
U1
USB.PUEN/USB.PUDIS
MCBSP3.CLK/USB1.TXEN
MCSI1.DOUT/USB1.TXD
RTC_WAKEUP_INT/USB1.SE0
MPU_BOOT/USB1.SUSP
GPIO0/USB.VBUS
OMAP5912
290 Universal Serial Bus (USB)
USB_PULLUP
OE
TXDAT/RCVDAT
TXSE0/RCVSE0
SUSPEND
VBUS_DETECT
R1, R2
R3, R4
R5
U1
U2
U3
U4
J1
Proper initialization of the OMAP5912 device to support this mode of operation
requires proper setting of the top-level pin multiplexing for these pins:
-
MCBSP3.CLKX/USB1.TXEN
-
MCSI1.DOUT/USB1.TXD
-
RTC_WAKE_INT/USB1.SE0
-
CLK32K_OUT/USB1.SPEED
-
MPU_BOOT/USB1.SUSP
See Table 74.
HMC_MODE must be set to a value that routes the OMAP5912 USB device
controller to USB
OTG_SYSCON_1.USB1_TRX_MODE must be set to 2 to allow proper
bidirectional operation
U2
OE
DAT
SE0 D+
D−
SPEED
SUSPEND
VDD
USB transceiver
Level shifter
Value depends on transceiver
Optional weak pulldown (see text)
1.5K Ohm 5%
OMAP5912
USB transceiver
Transient suppressor, like SN65220, SN65240, or SN75240
Level shifter
USB Type-B receptacle or USB Mini-B receptacle
pin group
of the 3-wire
R5
R1
D+
Transient
suppressor
D−
R2
R3
R4
VBUS
U4
2 (see Table 73).
USB transceiver.
SPRU761A
J1