For SDRAM connection PCB layout recommendations please look this application note:
"Interfacing SDRAM Devices to the PowerQUICC™ MPC8280 at 100 MHz"
https://www.nxp.com/docs/en/application-note/AN2654.pdf?fsrch=1&sr=1&pageNum=1
There is no document with PCB layout recommendations for flash and peripherals.
Have a great day,
Alexander
TIC
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