DS471 Datasheet, PDF (32/37 Pages) Xilinx, Inc – Channel FIFO

Channel FIFO (CFIFO) (v1.00a)
Figure Top x-ref 23
Clk
Rst
Bus2WFIFO_Ch_Num[0:7] 02
01
05
Bus2WFIFO_Burst
Bus2WFIFO_Data_WrReq
Bus2WFIFO_Status_RdReq
WFIFO2Bus_Ack
WFIFO2Bus_ErrAck
WFIFO2Bus_Ch_Valid
Bus2WFIFO_DBus[0:31]
Bus2WFIFO_Tag[0:3]
WFIFO2Bus_Status[0:31]
Comm2WFIFO_Ch_Num[0:7] 03
0000
00FE
FFEE
DDCC
BBAA
9988
0
7766
5544
3322
1100
2
01
0000
00FB
000000FF
WFIFO2Comm_Ch_Valid
Comm2WFIFO_Burst
Comm2WFIFO_RdReq
WFIFO2Comm_Ack
WFIFO2Comm_ErrAck
WFIFO2Comm_DBus[0:31]
WFIFO2Comm_Tag[0:3]
0123
4567
0
FFEEDDCC BBAA9988 77665544 33221100
0
2
WFIFO2Comm_HalfEmpty
WFIFO2Comm_AlmostEmpty
WFIFO2Comm_Empty
WFIFO2Comm_Occupancy[0:^]7 000
01
02 03
04
03
02
01
00
cycle 1
2
3
4
5
6
7
8
9 10 11 12 13 14
Figure 23: WFIFO Context Switch
DS471_23
32
www.xilinx.com
DS471 April 24, 2009
Product Specification