8 Replies Latest reply on Jun 29, 2018 6:13 AM by ZhiF_31

    S25FL512S (NOR flash) with Xilinx Virtex 7

    MaKv_3535946

      When using S25FL512S (NOR flash) with Xilinx Virtex 7 is it recommended to use same VIO supply as SPI bank supply on Virtex 7?

       

      According to Connecting Cypress SPI Serial Flash to Configure Xilinx FPGAs document:

      "Because tPU is an order of magnitude less than TPOR, the SPI flash becomes ready before the FPGA issues the read command if the same power rail supplies both FPGA and SPI flash. If not, a countermeasure may be needed".

       

      What will happen if the voltage to flash becomes active after the SPI bank voltage on FPGA?