EFM32WG Datasheet, PDF (365/834 Pages) List of Unclassifed Manufacturers – The EFM32WG Wonder Gecko is the ideal choice for demanding 8-, 16-, and 32-bit energy sensitive applications.

Offset
0x3C028
Reset
Access
Name
...the world's most energy friendly microcontrollers
Bit Position
Bit
31:16
15:10
9:0
Name
Reset
Access Description
NPTXFINEPTXF0DEP
0x0200
RW
Non-periodic TxFIFO Depth (host only) / IN Endpoint TxFIFO 0
Depth (device only)
This value is in terms of 32-bit words. Minimum value is 16. Maximum value is 512.
Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
NPTXFSTADDR
0x200
RW
Non-periodic Transmit RAM Start Address (host only)
This field contains the memory start address for Non-periodic Transmit FIFO RAM. Programmed values must not exceed the reset
value.
15.6.19 USB_GNPTXSTS - Non-periodic Transmit FIFO/Queue Status
Register
This register is used in host mode only. This read-only register contains the free space information for
the Non-periodic TxFIFO and the Nonperiodic Transmit Request Queue.
Offset
0x3C02C
Bit Position
Reset
Access
Name
Bit
31
30:24
23:16
Name
Reset
Access Description
Reserved
To ensure compatibility with future devices, always write bits to 0. More information in Section 2.1 (p. 3)
NPTXQTOP
0x00
R
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 [6:3]: Channel/endpoint number.
Bits [2:1]: 00: IN/OUT token, 01: Zero-length transmit packet (device IN/host OUT), 10: Unused, 11: Channel halt command.
Bit [0]: Terminate (last Entry for selected channel/endpoint).
NPTXQSPCAVAIL
0x08
R
Non-periodic Transmit Request Queue Space Available
2013-05-08 - Wonder Gecko Family - d0233_Rev0.50
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