Different in pin out for T version and TA version?

Question: why in the data sheet there is a different pin out for T version and TA version?

 

Answer:

Multiple chip enables for depth expansion: three chip enables for TA (GVTI) /A (CY) package version and two chip enables for B (GVTI) /BG (CY) and T (GVTI) /AJ (CY) package versions. JTAG boundary scan for B/BG and T/AJ package version. So we get: T-version= 2 chip enables w/JTAG {/AJ (CY) package } TA-version= 3 chip enables w/o JTAG {/A (CY) package}