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Synthesiable High PeRFormance SDRAM Contoller
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% C. f: b& k' r- g# hSynthesiable High Performance SDRAM Contoller
0 r- `8 y+ y* h. h A2 _% `+ ySynchronous DRAMs are available in speed grades above 100 MHz using LVTTL I/Os. The
j/ C0 T& M4 }0 `% KVirtex? series of FPGAs and the Spartan?-II family of FPGAs have many features, such as' X! r" ]& K- q. U( x
SelectI/O? resource and the Clock Delay Lock Loop, that make it easy to interface to high: a9 ^3 f( W5 U; r' u, Y g
speed Synchronous DRAMs. This application note describes the design and implementation of- v3 [6 g- Z2 n* }6 G }+ s7 m% G4 s
a synthesizable, parameterizable, flexible, auto-placed-and-routed synchronous DRAM6 P0 b8 B1 L3 H3 t& O
controller in the Virtex FPGA family. The design can also be implemented with a Spartan-II+ q6 @# C! o! D F* ?
device. A 32-bit wide data interface version can run up to 125 MHz when automatically placed
" m2 l, a7 r% g P2 j! q* A: L& _' Pand routed in a Virtex -6 speed grade device. Hand placed versions of the design can run even
6 |+ S) k1 x! l; c& f/ ufaster. |
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