Samsung S3C6400X User Manual page 841

USB2.0 HS OTG
NPTxQTop [30:24]
NPTxQSpcAvail [23:16]
NPTxFSpcAvail [15:0]
HOST PERIODIC TRANSMIT FIFO SIZE REGISTER (HPTXFSIZ)
This register holds the size and the memory start address of the Periodic TxFIFO.
Register Address
HPTXFSIZ 0x7C00_0100
HPTXFSIZ
PTxFSize [31:16]
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
26-34
Specifications and information herein are subject to change without notice.
[31] Reserved
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)
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
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
R/W
R/W
Bit R/W
R_W
Host Periodic TxFIFO Depth
This value is in terms of 32-bit words
· Minimum value is 16
· Maximum value is 32768
Description
Host Periodic Transmit FIFO SIZE Register
Description
S3C6400X RISC MICROPROCESSOR
Reset Value
Initial State
16'h1800
1'b0
7'h0
32 bits