How to access ASRAM over EMIF16

Vladimir Podgoretskiy

In our project we have connected Intel Strata P30 async flash (http://www.xilinx.com/products/boards/ml505/datasheets/30666604.pdf). Connection is like in sprugz3a chapter 2.5 (page 14):

The question is: after configuring NANDFCR to disable NAND-mode and A1CR for timings and bus-width(16 bits), how to access this flash? Does emif16-controller automatically do everything needed, and we can simply access memory on (0x70000000 + some_offset), where 0x70000000 - emif16 base memory space address?

over 13 years ago

0 Aditya over 13 years ago

TI__Expert 6815 points

Vladimir,

You are right. A master (CPU or non-CPU) should be able to simply access the memory starting at the CE0 base address 0x7000_0000. All signalling will be automatically handled by the EMIF16 controller.

0 Vladimir Podgoretskiy over 13 years ago in reply to Aditya

Intellectual 590 points

Ok, but what about special cases (commands) like Erase Intel flash, or read Page? Does all this emif do? Or to erase or page read I need to have special software (drivers) to do this?

0 Aditya over 13 years ago in reply to Vladimir Podgoretskiy

TI__Expert 6815 points

If the features/commands you mentioned are part of your flash device datasheet but not listed in the EMIF16 users guide, you will have to handle them in software. Typically manufacturers (like Spansion for example) provide software drivers that you can use.

0 Vladimir Podgoretskiy over 13 years ago in reply to Aditya

Intellectual 590 points

thanks a lot!

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How to access ASRAM over EMIF16