USB on-the-go full-speed/high-speed (OTG_FS/OTG_HS) RM0390
1158/1328 RM0390 Rev 4
31.15.32 OTG device configuration register (OTG_DCFG)
Address offset: 0x800
Reset value: 0x0220 0000
This register configures the core in device mode after power-on or after certain control
commands or enumeration. Do not make changes to this register after initial programming.
Note: Configuration register for USB OTG FS
Note: Configuration register for USB OTG HS
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res.
1514131211109876543210
ERRAT
IM
Res. Res. PFIVL[1:0] DAD[6:0] Res.
NZLSO
HSK
DSPD[1:0]
rw rw rw rw rw rw rw rw rw rw rw rw rw
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Res. Res. Res. Res. Res. Res. PERSCHIVL[1:0] Res. Res. Res. Res. Res. Res. Res. Res.
rw rw
1514131211109876543210
ERRAT
IM
XCVR
DLY
Res. PFIVL[1:0] DAD[6:0] Res.
NZLSO
HSK
DSPD[1:0]
rw rw rw rw rw rw rw rw rw rw rw rw rw rw
Bits 31:16 Reserved, must be kept at reset value for USB OTG FS.
Bits 31:26 Reserved, must be kept at reset value for USB OTG HS.
Bits 25:24 PERSCHIVL[1:0]: Periodic schedule interval for USB OTG HS
This field specifies the amount of time the Internal DMA engine must allocate for fetching
periodic IN endpoint data. Based on the number of periodic endpoints, this value must be
specified as 25, 50 or 75% of the (micro) frame.
– When any periodic endpoints are active, the internal DMA engine allocates
the specified amount of time in fetching periodic IN endpoint data
– When no periodic endpoint is active, then the internal DMA engine services
nonperiodic endpoints, ignoring this field
– After the specified time within a (micro) frame, the DMA switches to
fetching nonperiodic endpoints
00: 25% of (micro)frame
01: 50% of (micro)frame
10: 75% of (micro)frame
11: Reserved
Bits 23:16 Reserved, must be kept at reset value for USB OTG HS.
Bit 15 ERRATIM: Erratic error interrupt mask
1: Mask early suspend interrupt on erratic error
0: Early suspend interrupt is generated on erratic error
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