I see what has happened. I am using the CY8C5888XL1-LP099 but this does not have 20 bit delta sigma ADC.
I need the CY8C5888XLI-096. From what I see, these are identical pin out and function apart from the added ADC, is this correct?
In the latest datashet under ordering info -099 not shown, although roadmap
does show it as a new product.
Without filing a CASE, since datasheet does not seem to be updated, might
be impossible to determine if DelSig only difference.
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Sorry, Part numbers I wanted to compare are
CY8C5888AXI-LP096 and the LP099 version