AR# 54108: 14.4 EDK - AXI Quad SPI 1.00a has glitch between words
14.4 EDK - AXI Quad SPI 1.00a has glitch between words
Between word transactions, there is a glitch on the MOSI line in the 1.00a version of the core, (See picture attached: 1.0_glitch). This may cause issues with on-board level shifters that have a minimum pulse-width of greater than the glitch, generally one reference clock.
This issue is rectified in the 2.00a version of the core. In the attached image (2.0_glitch), you will see the same transaction (0x55 followed by 0xAA), with no glitch on the MOSI line between words