ST STM32L4x6 Reference Manual page 1546

USB on-the-go full-speed (OTG_FS)
Bits11:8 BESLTHRS: BESL threshold
Device mode:
The core puts the PHY into deep low-power mode in L1 when BESL value is greater than or
equal to the value defined in this field BESL_Thres[3:0].
Host mode:
The core puts the PHY into deep low-power mode in L1. BESLTHRS[3:0] specifies the time for
which resume signaling is to be reflected by host (T
detects device initiated resume.
BESLTHRS must not be programmed with a value greater than 1100b in host mode, because
this exceeds maximum T
Thres[3:0]Host mode resume signaling time (μs)
Bit 7 L1SSEN: L1 Shallow Sleep enable
Enables suspending the PHY in L1 Sleep mode. For maximum power saving during L1 Sleep
mode, this bit should be set to '1' by application SW in all the cases.
Bit 6 REMWAKE: bRemoteWake value
Host mode:
The value of remote wake up to be sent in the wIndex field of LPM transaction.
Device mode (read-only):
This field is updated with the received LPM token bRemoteWake bmAttribute when an ACK,
NYET, or STALL response is sent to an LPM transaction.
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L1HubDrvResume2
0000:75
0001:100
0010:150
0011:250
0100:350
0101:450
0110:950
All other values:reserved
DocID024597 Rev 3
L1HubDrvResume2
.
RM0351
) on the USB bus when it