USB on-the-go full-speed (OTG_FS) RM0351
1586/1693 DocID024597 Rev 3
43.15.54 OTG_FS register map
The table below gives the USB OTG register map and reset values.
Bit 5 ENL1GTG: Enable Sleep clock gating
When this bit is set, core internal clock gating is enabled in Sleep state if the core cannot
assert utmi_l1_suspend_n. When this bit is not set, the PHY clock is not gated in Sleep
state.
Bit 4 PHYSUSP: PHY Suspended
Indicates that the PHY has been Suspended. This bit is updated once the PHY is
Suspended after the application has set the STPPCLK bit.
Bits 3:2 Reserved, must be kept at reset value.
Bit 1 GATEHCLK: Gate HCLK
The application sets this bit to gate HCLK to modules other than the AHB Slave and Master
and wakeup logic when the USB is suspended or the session is not valid. The application
clears this bit when the USB is resumed or a new session starts.
Bit 0 STPPCLK: Stop PHY clock
The application sets this bit to stop the PHY clock when the USB is suspended, the session
is not valid, or the device is disconnected. The application clears this bit when the USB is
resumed or a new session starts.
Table 263. OTG_FS register map and reset values
Offset Register
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
0x000
OTG_
GOTGCTL
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
OTGVER
BSVLD
ASVLD
DBCT
CIDSTS
Res.
Res.
Res.
EHEN
DHNPEN
HSHNPEN
HNPRQ
HNGSCS
BVALOVAL
BVALOEN
AVALOVAL
AVALOEN
VBVALOVAL
VBVALOEN
SRQ
SRQSCS
Reset value 00001 0000000000000
0x004
OTG_
GOTGINT
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
IDCHNG
DBCDNE
ADTOCHG
HNGDET
Res.
Res.
Res.
Res.
Res.
Res.
Res.
HNSSCHG
SRSSCHG
Res.
Res.
Res.
Res.
Res.
SEDET
Res.
Res.
Reset value 0 0 0 0 0 0 0
0x008
OTG_
GAHBCFG
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
PTXFELVL
TXFELVL
Res.
Res.
Res.
Res.
Res.
Res.
GINTMSK
Reset value 00 0
0x00C
OTG_
GUSBCFG
Res.
FDMOD
FHMOD
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
TRDT
HNPCAP
SRPCAP
Res.
PHYSEL
Res.
Res.
Res.
TOCAL
Reset value 00 010100 1 000
0x010
OTG_
GRSTCTL
AHBIDL
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
Res.
TXFNUM
TXFFLSH
RXFFLSH
Res.
FCRST
Res.
CSRST
Reset value 1 0000000 000
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