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Synthesiable High PeRFormance SDRAM Contoller
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' O' {' O9 O2 q" zSynthesiable High Performance SDRAM Contoller7 m# O' U7 N. W9 @0 R
Synchronous DRAMs are available in speed grades above 100 MHz using LVTTL I/Os. The, n8 r+ W7 r2 q0 r4 C5 _
Virtex? series of FPGAs and the Spartan?-II family of FPGAs have many features, such as$ M6 ?% M1 a4 D- p
SelectI/O? resource and the Clock Delay Lock Loop, that make it easy to interface to high4 y9 F+ h/ G; w3 N* l* W0 }
speed Synchronous DRAMs. This application note describes the design and implementation of+ E# \" x. H5 C/ @ N1 A
a synthesizable, parameterizable, flexible, auto-placed-and-routed synchronous DRAM
' z+ n8 N. v5 R/ zcontroller in the Virtex FPGA family. The design can also be implemented with a Spartan-II
% e, d0 [3 @* R3 s0 t) Gdevice. A 32-bit wide data interface version can run up to 125 MHz when automatically placed
d7 @' L6 \4 T* U9 s# F& xand routed in a Virtex -6 speed grade device. Hand placed versions of the design can run even
& s `1 S! j* ?4 bfaster. |
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