DocID024597 Rev 5 1651/1830
RM0351 USB on-the-go full-speed (OTG_FS)
1774
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res.
OTG
VER
BSVLD ASVLD DBCT
CID
STS
rwrrrr
1514131211109876543210
Res. Res. Res. EHEN
DHNP
EN
HSHNP
EN
HNP
RQ
HNG
SCS
BVALO
VAL
BVALO
EN
AVALO
VAL
AVALO
EN
VBVAL
OVAL
VBVAL
OEN
SRQ
SRQ
SCS
rwrwrwrw r rwrwrwrwrwrwrw r
Bits 31:21 Reserved, must be kept at reset value.
Bit 20 OTGVER: OTG version
Selects the OTG revision.
0:OTG Version 1.3.
1:OTG Version 2.0. In this version the core supports only Data line pulsing for SRP.
Bit 19 BSVLD: B-session valid
Indicates the device mode transceiver status.
0: B-session is not valid.
1: B-session is valid.
In OTG mode, you can use this bit to determine if the device is connected or disconnected.
Note: Only accessible in device mode.
Bit 18 ASVLD: A-session valid
Indicates the host mode transceiver status.
0: A-session is not valid
1: A-session is valid
Note: Only accessible in host mode.
Bit 17 DBCT: Long/short debounce time
Indicates the debounce time of a detected connection.
0: Long debounce time, used for physical connections (100 ms + 2.5 µs)
1: Short debounce time, used for soft connections (2.5 µs)
Note: Only accessible in host mode.
Bit 16 CIDSTS: Connector ID status
Indicates the connector ID status on a connect event.
0: The
OTG_FS controller is in A-device mode
1: The
OTG_FS controller is in B-device mode
Note: Accessible in both device and host modes.
Bits 15:13 Reserved, must be kept at reset value.
Bit 12 EHEN: embedded host enable
It is used to select between OTG A device state machine and embedded Host state machine.
0: OTG A device state machine is selected
1: Embedded host state machine is selected
Bit 11 DHNPEN: Device HNP enabled
The application sets this bit when it successfully receives a SetFeature.SetHNPEnable
command from the connected USB host.
0: HNP is not enabled in the application
1: HNP is enabled in the application
Note: Only accessible in device mode.
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