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Extended SPI Commands

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Hi all ,

I'm trying to interface a Spartan-6 FPGA with an N25QAA13 Spi flash.
These my commands :
Wr Enable / Read-ID / Erase / Poll Flag Status Reg. / Wr Enable / Wr Data - Quad input Fast Program / Poll Flag Status Reg. / Wr Enable / Rd Data - Quad Output Fast Read
Altough I can read ChipIDa and Flag Status Register , DQ[3:0] lines(HiZ) always seems 4'b1111
Do you think is there any missing command in queue ?
 
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