Jonathan McClain

QE128 Memory Mapped Peripheral

Discussion created by Jonathan McClain on Mar 11, 2009
Latest reply on Mar 18, 2009 by Jonathan McClain

Can anyone tell me if there are any good documents out there that show a simple example of memory mapping an external RAM (or even an LCD) on the QE128 or other S08 with an MMU?  I'm assuming this would be a banked mode setting, but I can't even figure out how the address and data lines would be arranged on the QE128 - and whether I need any additional decode logic.  I have seen many examples in Freescale docs showing the internal page register manipulation and pointer control, but nothing that gives a nice hardware+software example of maybe adding a simple 8-bit memory mapped external part - and how to work with it.

 

Thanks much!

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