Altera cyclone V Technical Reference page 2299

cv_5v4
2016.10.28
Bit Name
17
lspddev
15
epdir
USB 2.0 OTG Controller
Send Feedback
Description
This field is Set by the application to indicate that this
channel is communicating to a low-speed device. The
application must program this bit when a low speed
device is connected to the host through an FS HUB.
The HS OTG Host core uses this field to drive the
XCVR_SELECT signal to 0x3 while communicating to
the LS Device through the FS hub. In a peer to peer
setup, the HS OTG Host core ignores this bit even if it
is set by the application software.
Value
0x0 Communicating with non lowspeed
0x1 Communicating with lowspeed
Indicates whether the transaction is IN or OUT.
Value
0x0 OUT
0x1 IN
Description
Description
18-209
hcchar5
Access Reset
RW 0x0
RW 0x0
Altera Corporation