RM0090: Reference manual - STMicroelectronics

RM0090 USB on-the-go high-speed (OTG_HS)
OTG_HS general core configuration register (OTG_HS_GCCFG)
Address offset: 0x038
Reset value: 0x0000 0000
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Reserved
NOVBUSSENS
SOFOUTEN
VBUSBSEN
VBUSASEN
I2CPADEN
.PWRDWN
rw rw rw rw rw rw
Reserved
Bits 31:22 Reserved, must be kept at reset value.
Bit 21 NOVBUSSENS: VBUS sensing disable option
When this bit is set, VBUS is considered internally to be always at VBUS valid level (5 V). This
option removes the need for a dedicated VBUS pad, and leave this pad free to be used for
other purposes such as a shared functionality. VBUS connection can be remapped on
another general purpose input pad and monitored by software.
This option is only suitable for host-only or device-only applications.
0: VBUS sensing available by hardware
1: VBUS sensing not available by hardware.
Bit 20 SOFOUTEN: SOF output enable
0: SOF pulse not available on PAD
1: SOF pulse available on PAD
Bit 19 VBUSBSEN: Enable the V BUS sensing “B” device
0: V BUS sensing “B” disabled
1: V BUS sensing “B” enabled
Bit 18 VBUSASEN: Enable the V BUS sensing “A” device
0: V BUS sensing “A” disabled
1: V BUS sensing “A” enabled
Bit 17 I2CPADEN: Enable I 2 C bus connection for the external I 2 C PHY interface.
0: I 2 C bus disabled
1: I 2 C bus enabled
Bit 16 PWRDWN: Power down
Used to activate the transceiver in transmission/reception
0: Power down active
1: Power down deactivated (“Transceiver active”)
Bits 15:0 Reserved, must be kept at reset value.
Doc ID 018909 Rev 3 1202/1416