Alex Parkinson

MC9S12NE64 with large (4MB) RAM buffer

Discussion created by Alex Parkinson on Feb 6, 2007
Latest reply on Feb 23, 2007 by Nouchi
Hello all,

I'm trying to decide on a microprocessor for a new design, and NE64 is very close to fulfilling all of our requirements, but not quite. The design requires Ethernet (I suppose on-chip Ethernet is not absolutely required, as we can add an external controller, but it would be very nice), I2C, and a 4MB external memory buffer. Looking at the datasheet for the NE64, it seems that the maximum size of memory that can be accessed is 1MB, if paging is used. Does anyone have experience adding more memory by using GPIO for additional address lines? Is this even possible?

Alex Parkinson