Swapping Lines of SDRAM with "LPC54628J512ET180E"

[Abhi1]

We have an application where we have interfaced "LPC54628J512ET180E" with SDRAM "IS42S16400J-7TLI" using EMC interface of LPC.

I have below queries regarding SDRAM interface with LPC.

1. Can we swap address lines of LPC-SDRAM interface for layout simplicity?
2. Can we swap Data lines of LPC-SDRAM interface for layout simplicity?
3. What are the conditions to swap data/Address lines of LPC-SDRAM interface?
4. What kind of Firmware changes we require if we swap data/Address lines?

[xiangjun_rong]

Hi, Abhi,

For the LPC family including LPC54628J512ET180E, the SDRAM controller of LPC54628 routes it's data bus and address bus to fixed pads, in other words, it is impossible to swap the data pins or swap the address pins, because the address and data pins are fixed.

For the pin assignment, pls refer to Chapter 10: LPC546xx I/O pin configuration (IOCON) in UM10912.pdf, it can be downloaded from the link:

https://www.nxp.com/webapp/sps/download/preDownload.jsp?render=true

Hope it can help you

BR

XiangJun Rong