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TMS570LS1225 and TMS570LS12x external memory address

Other Parts Discussed in Thread: TMS570LS1225

We are in the process of developing a board that uses the TMS570LS1225 337-pin BGA.

Looking at the datasheet (SPNS191A) and Technical Reference Manual (SPNU515A) there is reference to 22 address lines, but on the pinout of the 337-pin BGA (ZWT) it only shows ADDR[0] to ADDR[12]. this would be 8K paging.

At 8K pages this seems a bit low and then looking at the TMS570LS12x evaluation board from TI there is address lines on No Connect (NC) pins.

Can any provide some insight in what we are overlooking?

Thanks in advance