XAPP228 - Virtex 器件内的四端口存储器 Application Note: Virtex, Spartan-II, Spartan-IIE, Virtex-E, Virtex-II, Virtex-II Pro Families R Quad-Port Memories in Virtex Devices Author: Nick Sawyer and Marc Defossez XAPP228 (v1.0) September 24, 2002 Summary This application note describes how the existing dual-port block memories in the Spartan-II and Virtex families can be used as Quad-Port memories. This essentially involves a data access time (halved) versus functionality (doubled) trade-off. The overall bandwidth……