XC4VFX12-11FFG668I Xilinx Inc, XC4VFX12-11FFG668I Datasheet - Page 148
![no-image](/images/no-image-200.jpg)
XC4VFX12-11FFG668I
Manufacturer Part Number
XC4VFX12-11FFG668I
Description
IC FPGA VIRTEX-4 FX 12K 668FCBGA
Manufacturer
Xilinx Inc
Series
Virtex™-4r
Specifications of XC4VFX12-11FFG668I
Number Of Logic Elements/cells
12312
Number Of Labs/clbs
1368
Total Ram Bits
663552
Number Of I /o
320
Voltage - Supply
1.14 V ~ 1.26 V
Mounting Type
Surface Mount
Operating Temperature
-40°C ~ 100°C
Package / Case
668-BBGA, FCBGA
For Use With
HW-V4-ML403-UNI-G - EVALUATION PLATFORM VIRTEX-4HW-AFX-FF668-400 - BOARD DEV VIRTEX 4 FF668
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Number Of Gates
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
XC4VFX12-11FFG668I
Manufacturer:
XilinxInc
Quantity:
3 000
Company:
Part Number:
XC4VFX12-11FFG668I
Manufacturer:
Xilinx Inc
Quantity:
10 000
- Current page: 148 of 406
- Download datasheet (6Mb)
Chapter 4: Block RAM
148
EMPTY Latency
Programmable ALMOSTFULL and ALMOSTEMPTY flags are brought out to give the user
an early warning when the FIFO is approaching its limits. Both these flag values can be set
by configuration to (almost) anywhere in the FIFO address range.
Two operating modes affect the reading of the first word after the FIFO was empty:
•
•
The rising edge of EMPTY is fast, and inherently synchronous with RDCLK. The empty
condition can only be terminated by WRCLK, asynchronous to RDCLK. The falling edge of
EMPTY must, therefore, artificially be moved onto the RDCLK time domain. Since the two
clocks have an unknown phase relationship, it takes several cascaded flip-flops to
guarantee that such a move does not cause glitches or metastable problems. The falling
edge of EMPTY is thus delayed by several RDCLK periods after the first write into the
previously empty FIFO. This delay guarantees proper operation under all circumstances,
and causes an insignificant loss of performance after the FIFO had gone empty.
Table 4-9
Table 4-9: FIFO Capacity
4k+1 entries by 4 bits
2k+1 entries by 9 bits
1k+1 entries by 18 bits
512+1 entries by 36 bits
In Standard mode, the first word written into an empty FIFO will appear at DO after
the user has activated RDEN. The user must “pull” the data out of the FIFO.
In FWFT mode, the first word written into an empty FIFO will automatically appear
at DO without the user activating RDEN. The FIFO “pushes” the data onto DO. The
next RDEN will then “pull” the subsequent data word onto DO.
Standard Mode
shows the FIFO capacity in the two modes.
www.xilinx.com
4k+2 entries by 4 bits
2k+2 entries by 9 bits
1k+2 entries by 18 bits
512+2 entries by 36 bits
FWFT Mode
UG070 (v2.6) December 1, 2008
Virtex-4 FPGA User Guide
R
Related parts for XC4VFX12-11FFG668I
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![XC4VFX12-10FFG668C](/photos/6/73/67303/xc4vfx12-10ffg668c_tmb.jpg)
Part Number:
Description:
IC FPGA VIRTEX-4 FX 12K 668FCBGA
Manufacturer:
Xilinx Inc
Datasheet:
![XC4VFX12-10SFG363C](/images/no-image3.png)
Part Number:
Description:
IC FPGA VIRTEX-4 FX 12K 363FCBGA
Manufacturer:
Xilinx Inc
Datasheet:
![XC4VFX12-10SFG363I](/images/no-image3.png)
Part Number:
Description:
IC FPGA VIRTEX-4 FX 12K 363FCBGA
Manufacturer:
Xilinx Inc
Datasheet:
![XC4VFX12-11SFG363C](/images/no-image3.png)
Part Number:
Description:
IC FPGA VIRTEX-4 FX 12K 363FCBGA
Manufacturer:
Xilinx Inc
Datasheet:
![XC4VFX12-11FFG668C](/images/no-image3.png)
Part Number:
Description:
IC FPGA VIRTEX-4 FX 12K 668FCBGA
Manufacturer:
Xilinx Inc
Datasheet:
![XC4VFX12-11SFG363I](/images/no-image3.png)
Part Number:
Description:
IC FPGA VIRTEX-4 FX 12K 363FCBGA
Manufacturer:
Xilinx Inc
Datasheet:
![XC4VFX12-12SFG363C](/images/no-image3.png)
Part Number:
Description:
IC FPGA VIRTEX-4 FX 12K 363FCBGA
Manufacturer:
Xilinx Inc
Datasheet:
![XC4VFX12-12FFG668C](/images/no-image3.png)
Part Number:
Description:
IC FPGA VIRTEX-4 FX 12K 668FCBGA
Manufacturer:
Xilinx Inc
Datasheet:
![XC4VFX12-10SF363I](/images/no-image3.png)
Part Number:
Description:
IC FPGA VIRTEX-4FX 363FCBGA
Manufacturer:
Xilinx Inc
Datasheet:
![XC4VFX12-10FF668I](/images/no-image3.png)
Part Number:
Description:
IC FPGA VIRTEX-4FX 668FFBGA
Manufacturer:
Xilinx Inc
Datasheet:
![XC4VFX12-11SF363I](/images/no-image3.png)
Part Number:
Description:
IC FPGA VIRTEX-4FX 363FCBGA
Manufacturer:
Xilinx Inc
Datasheet:
![XC4VFX12-11FF668I](/images/no-image3.png)
Part Number:
Description:
IC FPGA VIRTEX-4FX 668FFBGA
Manufacturer:
Xilinx Inc
Datasheet:
![XC4VFX12-10FFG668I](/images/no-image3.png)
Part Number:
Description:
IC FPGA VIRTEX-4 FX 12K 668FCBGA
Manufacturer:
Xilinx Inc
Datasheet:
![XC4VFX12](/images/no-image3.png)
Part Number:
Description:
Virtex-4™ Family / newest generation FPGA
Manufacturer:
XILINX [Xilinx, Inc]
Datasheet:
![XC9536XL-10VQG44C](/photos/6/70/67071/xc9536xl-10vqg44c_tmb.jpg)
Part Number:
Description:
IC CPLD .8K 36MCELL 44-VQFP
Manufacturer:
Xilinx Inc
Datasheet: