In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Miner_with_a_PIC wrote:

Shane,

A possible issue:

The SX48 and SX52 both use $08 and $09 ram registers for RD and RE I/O ports respectively. In the SX20 both of these registers are free for general use. If you are not using these ports, I suppose that you could get away with using them as general purpose ram, but they would have to be set as outputs with nothing connected before any values could be written and held. It is far better to just not use them at all for your application (I am assuming that RD and RE are not connected). Another issue is that the bank address structure is different between the SX20 and SX48, given your explanation of the application you probably knew this already. And yes, using the SX48 device directive is appropriate and necessary.

JT

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