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Field
Name
R/W
Description
15:0
RXFDEP
R/W
RXFIFO Depth
RXFIFO is in word, and the depth range is: 16~256.
31:16
Reserved
Full-speed OTG TXFIFO configuration register
(OTG_FS_GTXFCFG)
Offset address: 0x28
Reset value: 0x0000 0200
Master mode
Field
Name
R/W
Description
15:0
NPTXSA
R/W
Nonperiodic TXFIFO RAM Start Address
This bit indicates the start address of non-periodic TXFIFO RAM.
31:16
NPTXFDEP
R/W
Nonperiodic TXFIFO Depth
TXFIFO is in word, and the depth range is: 16~256.
Device mode
Field
Name
R/W
Description
15:0
EPTXSA
R/W
Endpoint0
TXFIFO RAM Start Address
This bit indicates the start address of TXFIFO RAM of endpoint 0.
31:16 EPTXFDEP
R/W
Endpoint0 TXFIFO Depth
TXFIFO is in word, and the depth range is: 16~256.
Full-speed OTG non-periodic TXFIFO queue state register
(OTG_FS_GNPTXFQSTS)
Offset address: 0x2C
Reset value: 0x0008 0200
Field
Name
R/W
Description
15:0
NPTXFSA
R
Nonperiodic TXFFIO Space Available
These bits indicate the size of available space of non-periodic
TXFIFO.
(In 32-bit words)
0x0: Non-periodic TXFIFO is full
0x1: 1 word
0x2: 2 words
…..
0xn: n words are available (0≤n≤256)
Others: Reserved
23:16
NPTXRSA
R
Non-periodic Transmit Request Space Available
This bit indicates the available space size of non-periodic transmit
request queue.
In master mode: Save IN and OUT requests
In device mode: There is only IN request
0x0: The queue is full
0x0: 1 position
0x2: 2 positions