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TMS320DM648 EMIF Addressing

Gail Dagan
Prodigy 40 points

I have question on the TMS320DM648 EMIF controller addressing. 

I'm using a Spansion FLASH, P/N S29GL256P, a 256MBit device with a 16-bit  data bus.  It has address bits A23-A0 to access the memory space.   In the EMIF document (SPRUEK6B) I'm looking at Figure 5 and Section 4.1 Async Interface Addressing.  I'm slightly confused about the correct way to hook up the DM648 address to the FLASH device and the use of the ABA1 bit.  Specifically, in the Figure, it shows

DM648 pins AEA[N:0] connected to mem device A[N:1]. That looks like an addess bus width mismatch.  Should it be

DM648 AEA[N-1:0] connected to FLASH A[N:1] and DM648 ABA1 connected to FLASH A[0]?     OR

DM648 AEA[N:1] connected to FLASH A[N:1] and DM648 ABA1 connected to FLASH A[0]?