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PRELIMINARY
USB2.0 HS OTG
S3C6400X RISC MICROPROCESSOR
26-32
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.
GRXSTSR/
GRXSTSP
Bit
R/W
Description
Initial State
[31:25]
Reserved
7’h0
FN
[24:21]
RO
Frame Number
This is the least significant 4 bits of the (micro)frame
number in which the packet is received on the USB.
This field is supported only when isochronous OUT
endpoints are supported.
4’h0
PktSts
[20:17]
RO
Packet Status
Indicates the status of the received packet.
·
4'b0001 : Global OUT NAK (triggers an interrupt)
·
4'b0010 : OUT data packet received
·
4'b0011 : OUT transfer completed (triggers an
interrupt)
·
4'b0100 : SETUP transaction completed (triggers
an interrupt)
·
4'b0110 : SETUP data packet received
·
others : Reserved
4’b0
DPID
[16:15]
RO
Data PID
Indicates the Data PID of the received OUT data
packet.
·
2'b00 : DATA0
·
2'b01 : DATA1
·
2'b10 : DATA2
·
2'b11 : MDATA
2’b0
BCnt
[14:4]
RO
Byte Count
Indicates the byte count of the received data packet.
11’h0
EPNum
[3:0]
RO
Endpoint number
Indicates the endpoint number to which the current
received packet belongs.
4’h0
RECEIVE FIFO SIZE REGISTER (GRXFSIZ)
The application can program the RAM size that must be allocated to the RxFIFO.
Register
Address
R/W
Description
Reset Value
GRXFSIZ 0x7C00_0024
R/W
Receive
FIFO Size Register
32 bits
GRXFSIZ
Bit
R/W
Description
Initial State
[31:16]
Reserved
16’h0
RxFDep
[15:0]
R_W
RxFIFO Depth
This value is in terms of 32-bit words.
·
Minimum value is 16
16’h1800