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EPI Host Bus Chip Select Timing



Hi,

I'm experimenting with the EPI bus on the TM4C129 Eval board. I've configured the EPI controller to Host bus 8 mode with CSCFG set to "ALE with Quad Chip Select".  The captured timing waveforms are shown below. This is a write operation. The datasheet timing diagrams imply that chip select should go active around the time as the falling edge of the write strobe and certainly along time after the ALE pulse. Instead it seems like chip select is going active at the same time as ALE. Is this normal.

Color Coding:

Black=WRN; Brown=CS0, Red=ALE; Orange=AD0; Yellow=CS1;

main.cpp