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5CGXC4 参数 Datasheet PDF下载

5CGXC4图片预览
型号: 5CGXC4
PDF下载: 下载PDF文件 查看货源
内容描述: 旋风V器件手册 [Cyclone V Device Handbook]
分类和应用:
文件页数/大小: 74 页 / 1776 K
品牌: ALTERA [ ALTERA CORPORATION ]
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Chapter 1: Overview for Cyclone V Device Family  
1–13  
Variable-Precision DSP Block  
Variable-Precision DSP Block  
Cyclone V devices feature a variable-precision DSP block that you can configure to  
support signal processing with precisions ranging from 9 x 9, 18 x 19, and 27 x 27 bits  
natively.  
You can configure each DSP block during compilation as independent three 9 x 9, two  
18 x 19, or one 27 x 27 multipliers. With a dedicated 64-bit cascade bus, you can  
cascade multiple variable-precision DSP blocks to implement even higher precision  
DSP functions efficiently.  
The variable-precision DSP block also supports these features:  
A 64-bit accumulator that is the largest in the industry.  
A hard preadder that is available in both 18- and 27-bit modes.  
Cascaded output adders for efficient systolic finite impulse response (FIR) filters.  
Internal coefficient register banks, 8 deep, for each multiplier in 18- or 27-bit mode.  
Fully independent multiplier operation.  
A second accumulator feedback register to accommodate complex  
multiply-accumulate functions.  
Efficient support for single- and double-precision floating point arithmetic.  
The inferability of all modes by the Quartus® II design software.  
Table 1–11 lists the relevant DSP block configurations for a few usage examples.  
Table 1–11. Variable-Precision DSP Block Configurations for Cyclone V Devices  
Usage Multiplier Size (Bit)  
Low precision fixed point for video applications Three 9 x 9  
Two 18 x 19  
DSP Block Resource  
1 variable-precision DSP block  
1 variable-precision DSP block  
Medium precision fixed point in FIR filters  
FIR filters and general DSP usage  
Two 18 x 19 with accumulate 1 variable-precision DSP block  
High precision fixed- or floating-point implementations One 27 x 27 with accumulate 1 variable-precision DSP block  
Table 1–12 lists the variable-precision DSP resources by bit precision for each  
Cyclone V device.  
Table 1–12. Number of Multipliers in Cyclone V Devices (Part 1 of 2)  
Independent Input and Output  
Multiplications Operator  
18 x 18  
Multiplier  
Adder  
Summed  
with 36-bit  
Input  
Variable-  
precision  
DSP Block  
18 x 19  
Multiplier  
Adder Mode  
Variant  
Device  
9 x 9  
18 x 19  
Multiplier  
27 x 27  
Multiplier  
Multiplier  
5CEA2  
5CEA4  
5CEA5  
5CEA7  
5CEA9  
25  
72  
75  
216  
50  
25  
72  
25  
72  
25  
72  
144  
248  
312  
684  
Cyclone V E  
124  
156  
342  
372  
124  
156  
342  
124  
156  
342  
124  
156  
342  
468  
1,026  
February 2012 Altera Corporation  
Cyclone V Device Handbook  
Volume 1: Device Overview and Datasheet