Texas Instruments OMAP5912 Reference Manual page 1555

USB Transceiver 4-Wire Bidirectional Signaling
Table 78. Signaling Between USB Controller and 4-Wire Unidirectional USB
Transceiver Using VP/VM Signaling
Logical Sig- OMAP5912
nal Name Pin Direction
OE Output
TXVM/
RCVVM RCVVM
Output
Input
TXVP/
RCVVP RCVVP
Output
Input
RCV Input
SPRU761A
When a USB or USB OTG transceiver is connected to OMAP5912 and is used
in 4-wire bidirectional DAT/SE0 signaling mode, the signaling shown in
Table 78 is used.
Transceiver
Pin Direction
Input
Input
Output
Input
Output
Output
Description
When low, USB transceiver drives D+ and D-.
Value driven to or received from D-
OEn TXVM
0 0
0 1
OEn D-
1 0
1 1
Value driven to or received from D+
OEn TXVP
0 0
0 1
OEn D+
1 0
1 1
Output from transceiver single-ended D- signal receiver.
D+ D-
0 0
0 1
1 0
1 1
Universal Serial Bus (USB)
USB OTG Controller
D-
0
1
RCVVM
0
1
D+
0
1
RCVVP
0
1
RCV
X
0
1
X
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