I am working on LM3S9B96 ARM cortexM3 controller.I am trying to access external peripheral(FLASH) through EPI (External Peripheral Interface).
I configured EPI in 16-bit mode and i am assigning Flash base address as 0x60000001.I am getting chip select and all ,According to base address A0 pin from controller should be high but it is not going high.
when i am assigning Flash base address as 0x60000002 then A0 going high and A1 remains low.
Based on above criteria some address shifting is happening .Because of that i am unable to access Flash correctly.
can anybody tell me the causes of problem and as well as solution
pls do the needful
When running in 16 bit mode half word accesses are used. A0 at the pin represents the internal A1 of the core, hence 0xXXXXXXX2 is A2 internal = A1 external = 0, A1 internal = A0 external = 1. Based on this you can connect directly to 16 bit wide memories.
Hope this helps.
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