Samsung S5PC100, User Manual

Page: 919 / 1863

USB2.0 HS OTG S5PC100 USER’S MANUAL (REV1.0)
8.10 -76
8.2.52 Device OUT Endpoint 0 Transfer Size Register (DOEPTSIZ0, R/W, Address = 0xED20_0B10)
DOEPTSIZ0 Bit Description R/W Reset Value
Reserved [31] - 1'b0
SUPCnt [30:29] SETUP Packet Count
This field specifies the number of back-to-back SETUP data
packets the endpoint can receive.
•
2'b01 : 1 packet
•
2'b10 : 2 packets
•
2'b11 : 3 packets
R/W 2'h0
Reserved [28:20] - 9'h0
PktCnt [19] Packet Count
This field is decremented to zero after a packet is written into
the RxFIFO.
R/W 1'b0
Reserved [18:7] - 12'h0
XferSize [6:0] Transfer Size
Indicates the transfer size in bytes for endpoint 0. The core
interrupts the application only after it has exhausted the
transfer size amount of data. The transfer size can be set to
the maximum packet size of the endpoint, to be interrupted at
the end of each packet.
The core decrements this field every time a packet is read from
RxFIFO and written to the external memory. R/W 7'h0