Samsung S3C6400X, User Manual, Page: 841 / 1189

PRELIMINARY
USB2.0 HS OTG S3C6400X RISC MICROPROCESSOR
26-34
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
[31] Reserved 1’b0
NPTxQTop [30:24]
RO
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] :
·
2’b00 : IN/OUT token
· 2’b01 : Zero-length transmit packet (device IN/host
OUT)
·
2’b10 : PING/CSPLIT token
·
2’b11 : Channel halt command
·
Bit[24] : Terminate (last entry for selected
channel/endpoint)
7’h0
NPTxQSpcAvail [23:16] RO 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 in Host mode.
Device mode has only IN requests.
· 8’h0 : Non-Periodic Transmit Request Queue is full
·
8’h1 : 1 location available
·
8’h2 : 2 locations available
· n : n locations available(0 ≤ n ≤ 8)
·
Others : Reserved
NPTxFSpcAvail [15:0] RO Non-Periodic TxFIFO Space Available
Indicates the amount of free space available in the
Non-Periodic TxFIFO.
Values are in terms of 32-bit words.
·
16’h0 : Non-Periodic TxFIFO is full
·
16’h1 : 1 word available
· 16’h2 : 2 words available
·
16’hn : n words available (where 0
≤
n
≤
32768)
·
16’h8000 : 32768 words available
· Others : Reserved
HOST PERIODIC TRANSMIT FIFO SIZE REGISTER (HPTXFSIZ)
This register holds the size and the memory start address of the Periodic TxFIFO.
Register Address R/W Description Reset Value
HPTXFSIZ 0x7C00_0100 R/W Host Periodic Transmit FIFO SIZE Register 32 bits
HPTXFSIZ Bit R/W Description Initial State
PTxFSize [31:16]
R_W
Host Periodic TxFIFO Depth
This value is in terms of 32-bit words
· Minimum value is 16
·
Maximum value is 32768
16’h1800