Otg Control And Status Register (Otg_Gotgctl) - ST STM32F412 Reference Manual

RM0402
29.15.1

OTG control and status register (OTG_GOTGCTL)

Address offset: 0x000
Reset value: 0x0001 0000
The OTG_GOTGCTL register controls the behavior and reflects the status of the OTG
function of the core.
31 30 29
Res. Res. Res. Res.
15 14 13
Res. Res. Res. EHEN
Bits 31:22 Reserved, must be kept at reset value.
Bit 21 CURMOD: Current mode of operation
Indicates the current mode (host or device).
0: Device mode
1: Host mode
Bit 20 OTGVER: OTG version
Selects the OTG revision.
0:OTG Version 1.3. OTG1.3 is obsolete for new product development.
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, the user 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.
28 27 26 25
Res. Res. Res.
12 11 10 9
DHNP HSHNP HNP
EN EN RQ
rw rw rw rw
USB on-the-go full-speed (OTG_FS)
24 23 22
Res. Res. Res.
MOD
8 7 6
HNG BVALO BVALO AVALO
SCS VAL EN
r rw rw
RM0402 Rev 6
21 20 19 18
CUR OTG
BSVLD ASVLD
VER
r rw r r
5 4 3 2
AVALO VBVAL VBVAL
VAL EN OVAL OEN
rw rw rw rw
17 16
CID
DBCT
STS
r r
1 0
SRQ
SRQ
SCS
rw r
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