SDRAM verilog 代码，已经在MT48LC1M16A1上验证过。-The MT48LC1M16A1 is a 16Mb SDRAM arranged in 1M x 16bits. 1. the SDRAM has been initialized with CAS latency=2, and any valid burst mode 2. the read agent is active enough to refresh the RAM (if not, add a re