Hi,
Unfortunately I don't have experience with the DDC total ACE 1553 chip, however you can use the following application note as reference, this application note describes how to properly interface SDRAM memory to the LPC1800 and LPC4300 External Memory Controller.
https://www.nxp.com/docs/en/application-note/AN11508.pdf
I hope this helps,
Have a great day,
Sol
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