RM0402 Rev 6 999/1163
RM0402 USB on-the-go full-speed (OTG_FS)
1122
Bit 4 AVALOEN: A-peripheral session valid override enable.
This bit is used to enable/disable the software to override the Avalid signal using the
AVALOVAL bit.
0:Override is disabled and Avalid signal from the respective PHY selected is used internally
by the core
1:Internally Avalid received from the PHY is overridden with AVALOVAL bit value
Note: Only accessible in host mode.
Bit 3 VBVALOVAL: V
BUS
valid override value.
This bit is used to set override value for vbusvalid signal when VBVALOEN bit is set.
0: vbusvalid value is '0' when VBVALOEN = 1
1: vbusvalid value is '1' when VBVALOEN = 1
Note: Only accessible in host mode.
Bit 2 VBVALOEN: V
BUS
valid override enable.
This bit is used to enable/disable the software to override the vbusvalid signal using the
VBVALOVAL bit.
0: Override is disabled and vbusvalid signal from the respective PHY selected is used
internally by the core
1: Internally vbusvalid received from the PHY is overridden with VBVALOVAL bit value
Note: Only accessible in host mode.
Bit 1 SRQ: Session request
The application sets this bit to initiate a session request on the USB. The application can
clear this bit by writing a 0 when the host negotiation success status change bit in the
OTG_GOTGINT register (HNSSCHG bit in OTG_GOTGINT) is set. The core clears this bit
when the HNSSCHG bit is cleared.
If the user uses the USB 1.1 full-speed serial transceiver interface to initiate the session
request, the application must wait until V
BUS
discharges to 0.2 V, after the B-session valid bit
in this register (BSVLD bit in OTG_GOTGCTL) is cleared.
0: No session request
1: Session request
Note: Only accessible in device mode.
Bit 0 SRQSCS: Session request success
The core sets this bit when a session request initiation is successful.
0: Session request failure
1: Session request success
Note: Only accessible in device mode.
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