RM0090: Reference manual - STMicroelectronics

RM0090 USB on-the-go full-speed (OTG_FS)
Bits 31:22 Reserved, must be kept at reset value.
Bit 21 NOVBUSSENS: V BUS sensing disable option
When this bit is set, V BUS is considered internally to be always at V BUS valid level (5 V). This
option removes the need for a dedicated V BUS pad, and leave this pad free to be used for
other purposes such as a shared functionality. V BUS 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: V BUS sensing available by hardware
1: V BUS 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 Reserved, must be kept at reset value.
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.
OTG_FS core ID register (OTG_FS_CID)
Address offset: 0x03C
Reset value:0x0000 1100
This is a read only register containing the Product ID.
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
PRODUCT_ID
rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw rw
Bits 31:0 PRODUCT_ID: Product ID field
Application-programmable ID field.
Doc ID 018909 Rev 3 1066/1416