Altera cyclone V Technical Reference page 2133

cv_5v4
2016.10.28
Bit
11
devhnpen
10
hstsethnpen
9
hnpreq
8
hstnegscs
USB 2.0 OTG Controller
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Name
Mode: Device only. The application sets this bit when
it successfully receives a SetFeature.SetHNPEnable
command from the connected USB host.
Value
0x0
0x1
Mode: Host only. The application sets this bit when it
has successfully enabled HNP (using the
SetFeature.SetHNPEnable command) on the
connected device.
Value
0x0
0x1
Mode: Device only. The application sets this bit to
initiate an HNP request to the connected USB host.
The application can clear this bit by writing a 0 when
the Host Negotiation Success Status Change bit in the
OTG Interrupt register
(GOTGINT.HstNegSucStsChng) is SET.The core
clears this bit when the HstNegSucStsChng bit
iscleared.
Value
0x0
0x1
Mode: Device only. Host Negotiation Success
(HstNegScs)​ The core sets this bit when host negotia‐
tion is successful. The core clears this bit when the
HNP Request (HNPReq) bit in this register is SET.
Value
0x0
0x1
Description
Description
HNP is not enabled in the application
HNP Enabled
Description
Host Set HNP is not enabled
Host Set HNP is enabled
Description
No HNP request
HNP request
Description
Host negotiation failure
Host negotiation success
18-43
gotgctl
Access Reset
RW 0x0
RW 0x0
RW 0x0
RO 0x0
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