| 这外部SRAM , 我用的也是10NS的,  ISSI IS61LV25616 - 10T 下面的配置用了几年了一直好好的, 最近老出问题, 不知怎么回事 XintfRegs.XTIMING6.bit.XWRLEAD = 1;//1
 XintfRegs.XTIMING6.bit.XWRACTIVE = 1;
 XintfRegs.XTIMING6.bit.XWRTRAIL = 1;
 // Zone read timing
 XintfRegs.XTIMING6.bit.XRDLEAD = 1;//1
 XintfRegs.XTIMING6.bit.XRDACTIVE = 1;
 XintfRegs.XTIMING6.bit.XRDTRAIL = 0;
 
 // double all Zone read/write lead/active/trail timing
 XintfRegs.XTIMING6.bit.X2TIMING = 0;
 
 // Zone will sample XREADY signal
 XintfRegs.XTIMING6.bit.USEREADY = 0;
 XintfRegs.XTIMING6.bit.READYMODE = 0;  // sample asynchronous
 
 // Size must be 1,1 - other values are reserved
 XintfRegs.XTIMING6.bit.XSIZE = 3;
 |