RM0390 Rev 4 1137/1328
RM0390 USB on-the-go full-speed/high-speed (OTG_FS/OTG_HS)
1264
31.15.12 OTG general core configuration register (OTG_GCCFG)
Address offset: 0x038
Reset value: 0x0000 XXXX
Bit 31 Reserved, must be kept at reset value.
Bits 30:24 NPTXQTOP[6:0]: Top of the non-periodic transmit request queue
Entry in the non-periodic Tx request queue that is currently being processed by the MAC.
Bits 30:27: Channel/endpoint number
Bits 26:25:
00: IN/OUT token
01: Zero-length transmit packet (device IN/host OUT)
11: Channel halt command
Bit 24: Terminate (last entry for selected channel/endpoint)
Bits 23:16 NPTQXSAV[7:0]: Non-periodic transmit request queue space available
Indicates the amount of free space available in the non-periodic transmit request queue.
This queue holds both IN and OUT requests.
0: Non-periodic transmit request queue is full
1: 1 location available
2: locations available
n: n locations available (0 n 8)
Others: Reserved
Bits 15:0 NPTXFSAV[15:0]: Non-periodic Tx FIFO space available
Indicates the amount of free space available in the non-periodic Tx FIFO.
Values are in terms of 32-bit words.
0: Non-periodic Tx FIFO is full
1: 1 word available
2: 2 words available
n: n words available (where 0 n 512)
Others: Reserved
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. VBDEN Res. Res. Res. Res.
PWR
DWN
rw rw
1514131211109876543210
Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res. Res.
Bits 31:22 Reserved, must be kept at reset value.
Bit 21 VBDEN: USB V
BUS
detection enable
Enables V
BUS
sensing comparators to detect V
BUS
valid levels on the V
BUS
PAD for USB
host and device operation. If HNP and/or SRP support is enabled, V
BUS
comparators are
automatically enabled independently of VBDEN value.
0 = V
BUS
detection disabled
1 = V
BUS
detection enabled
Bits 20:19 Reserved, must be kept at reset value.
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