The Virtex-4 features, such as the programmable IDELAY and built-in FIFO support, simplifythe bridging of a high-speed, PCI-X core to large amounts of DDR-SDRAM memory. Onechallenge is meeting the PCI-X target initial latency specification. PCI-X Protocol Addendum tothe PCI Local Bus Specification Revision 2.0a ([Ref 6]) dictates that when a target signals adata transfer, "the target must do so within 16 clocks of the assertion of FRAME#." PCItermination transactions, such as Split Response/Complete, are commonly used to meet thelatency specifications. This method adds complexity to the design, as well as additional systemlatency. Another solution is to increase the ratio of the memory frequency to the PCI-X busfrequency. However, this solution increases the required power and clock resource usage.
上传时间: 2013-11-24
上传用户:18707733937
支持X/YModem和cis_b+协议的串口通讯程序
上传时间: 2014-01-17
上传用户:qweqweqwe
支持X/Y/Z Modem协议的传输文件的通讯程序
上传时间: 2015-01-03
上传用户:xg262122
X Windows下的迷宫程序
上传时间: 2015-01-04
上传用户:372825274
支持Windows 3.x、Windows 9x平台上的中文(GB、Big5)、日文(Shift JIS、EUC JIS)、韩文(KS C 5601)、HZ码的显示与输入,智能内码识别,支持屏幕取词翻译的16位程序(VC1.5编译)。作者:朱佳良
上传时间: 2013-12-28
上传用户:003030
支持SSL v2/v3, TLS, PKCS #5, PKCS #7, PKCS #11, PKCS #12, S/MIME, X.509v3证书等安全协议或标准的开发库编译用到NSPR
上传时间: 2014-01-27
上传用户:sammi
用对半分法计算f(x)=0
上传时间: 2013-12-10
上传用户:小码农lz
用双点弦截法计算f(x)=0
标签: 计算
上传时间: 2013-11-28
上传用户:shinesyh
序员通过图形用户界面为X-windows来编写程序,主要一类库是直接实例化窗口对象 并得出新类,许多现实的实例程序。
上传时间: 2013-12-22
上传用户:c12228
功能:返回双精度参数的反全余弦的三角函数值 返回返回双精度参数y和x的数值由公式y/x计算的反正切三角函数值
上传时间: 2014-10-31
上传用户:dongbaobao