EMIF16 support generic interface

Wenjun,

When the EMIF16 controller was originally designed with NAND flash support, ONFI did not exist.

So EMIF16 is not a standard NAND controller, i.e., it is just an async memory controller that can be used to access NAND. All NAND protocols in terms of command sequencing, address sequencing, page/block access, etc. needs to be taken care by the software.

Note: NAND flash does not use EMIF16's address bus for addressing. Rather, it uses the EMIF16's data bus for both addressing and data (multiplexed). So you can address memory larger than 32MB. My reply to your previous post suggesting a 32MB limit was regarding NOR and SRAM only.

I will get back to you on CFI.

I just got word that when the EMIF controller was originally designed CFI did not exist, hence can't say whether we are compliant with it or not (most probably not).