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USB Host on USB Alternate Pin Group 2, 3-Wire USB Transceiver
SPRU761A
-
MCSI2.DOUT/USB2.TXEN
-
UART2.TX/USB2.TXD
-
UART2.RTS/USB2.SE0
-
UART2.CTS/USB2.RCV
-
MCSI2.DIN/USB2.VP
-
UART2.RX/USB2.VM
-
MCSI2.SYNC/USB2.SPEED
-
MCSI2.CLK/USB2SUSP
See Table 74.
HMC_MODE must be set to a value that routes a host controller port to USB
pin group 2 (see Table 73). OTG_SYSCON_1.USB2_TRX_MODE must be
set to 3 to allow proper unidirectional operation of the 6-wire USB transceiver.
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 73 shows USB host port connectivity when pin group 2 is configured
for alternate mode and connected using a 3-wire USB transceiver. When pin
group 2 is configured in alternate mode, pins USB.DP and USB.DM are not
usable for USB functionality.
USB OTG Controller
Universal Serial Bus (USB)
283
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