In the Quad SPI version 3.2 core, the Slave select toggles at the end of the transaction. The work-around to avoid the slave select toggle is to use manual slave selection mode.
Is there an automatic slave selection mode available?
A patch is attached to this Answer Record for Vivado 2016.4 which adds automatic slave selection mode.
Please read the text file present under patch_readme for notes on using the patch.
The IP RTL will be changed in Vivado 2017.1 so no patch will be required.
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