Samsung S3C6400X User Manual page 839

USB2.0 HS OTG
GRXSTSR/
GRXSTSP
[31:25]
FN [24:21]
PktSts [20:17]
DPID [16:15]
BCnt [14:4]
EPNum
RECEIVE FIFO SIZE REGISTER (GRXFSIZ)
The application can program the RAM size that must be allocated to the RxFIFO.
Register Address
GRXFSIZ 0x7C00_0024
GRXFSIZ
[31:16]
RxFDep [15:0]
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
26-32
Specifications and information herein are subject to change without notice.
Bit R/W
Reserved
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.
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
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
RO Byte Count
Indicates the byte count of the received data packet.
[3:0] RO Endpoint number
Indicates the endpoint number to which the current
received packet belongs.
R/W
R/W
Bit R/W
Reserved
R_W RxFIFO Depth
This value is in terms of 32-bit words.
· Minimum value is 16
S3C6400X RISC MICROPROCESSOR
Description
Description
Receive FIFO Size Register
Description
Initial State
7'h0
4'h0
4'b0
2'b0
11'h0
4'h0
Reset Value
32 bits
Initial State
16'h0
16'h1800