- 您现在的位置：买卖IC网 > PDF目录362744 > EPC16xxx (Altera Corporation) 435882001 PDF资料下载
参数资料
| 型号： | EPC16xxx |
| 厂商： | Altera Corporation |
| 英文描述： | 435882001 |
| 中文描述： | 2。增强型配置器件（EPC4，EPC8 |
| 文件页数： | 17/36页 |
| 文件大小： | 421K |
| 代理商： | EPC16XXX |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页当前第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页
Altera Corporation
August 2005
2–17
Configuration Handbook, Volume 2
Enhanced Configuration Devices (EPC4, EPC8 & EPC16) Data Sheet
1
The decompression feature supported in the enhanced
configuration devices is different from the decompression
feature supported by the Stratix II FPGAs and the Cyclone
series. When configuring Stratix II FPGAs or the Cyclone series
using enhanced configuration devices, Altera recommends
enabling decompression in Stratix II FPGAS or the Cyclone
series only for faster configuration.
The compression algorithm used in Altera devices is optimized for FPGA
configuration bitstreams. Since FPGAs have several layers of routing
structures (for high performance and easy routability), large amounts of
resources go unused. These unused routing and logic resources as well as
un-initialized memory structures result in a large number of
configuration RAM bits in the disabled state. Altera's proprietary
compression algorithm takes advantage of such bitstream qualities.
The general guideline for effectiveness of compression is the higher the
device logic/routing utilization, the lower the compression ratio (where
compression ratio is defined as original bitstream size divided by the
compressed bit-stream size).
For Stratix designs, based on a suite of designs with varying amounts of
logic utilization, the minimum compression ratio was observed to be 1.9
or a ~47
%
size reduction for these designs.
Table 2–5
shows sample
compression ratios from a suite of Stratix designs. These numbers serve
as a guideline (not a specification) to help you allocate sufficient
configuration memory to store compressed bitstreams.
Table 2–5. Stratix Compression Ratios
Note (1)
Minimum
Average
Logic Utilization
98
%
64
%
Compression Ratio
1.9
2.3
%
Size Reduction
47
%
57
%
Note to
Table 2–5
:
(1)
These numbers are preliminary. They are intended to serve as a guideline, not a
specification.
相关PDF资料 |
PDF描述 |
|---|---|
| EPC4QC100 | 2. Enhanced Configuration Devices (EPC4, EPC8 & EPC16) Data Sheet |
| EPC4QI100 | 2. Enhanced Configuration Devices (EPC4, EPC8 & EPC16) Data Sheet |
| EPC16UC88 | 2. Enhanced Configuration Devices (EPC4, EPC8 & EPC16) Data Sheet |
| EPCS1 | Serial Configuration Devices |
| EPCS16 | Serial Configuration Devices |
相关代理商/技术参数 |
参数描述 |
|---|---|
| EPC17 | 制造商:TDK 制造商全称:TDK Electronics 功能描述:Ferrite Cores For Power Supply and Signal Transformer EPC Cores |
| EPC-17 | 制造商:Curtis Industries 功能描述: |
| EPC-18 | 制造商:Curtis Industries 功能描述:Conn Barrier Strip 18 POS 9.52mm Solder ST Thru-Hole 15A |
| EPC19 | 制造商:TDK 制造商全称:TDK Electronics 功能描述:Ferrite Cores For Power Supply and Signal Transformer EPC Cores |
| EPC1900TT25002GB40SSW7NL | 制造商:OMRON AUTOMATION AND SAFETY 功能描述:19" IND PC RES TOUCH COREDUO |
发布紧急采购，3分钟左右您将得到回复。