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

Is there anything special I need to do in the programming of the SX when switching from the internal 4mhz oscillator to an external 50mhz oscillator? Do I need to change the "DEVICE" directive or the "FREQ" directive or both or neither?
 

I am reading an incremental encoder with an interrupt routine and found that sometimes if I move the encoder too fast, the SX fails to count appropriately.

 

This is what my SX/B code looks like at the beginning.

 



[code]
DEVICE          SX28, OSC4MHZ, TURBO, STACKX, OPTIONX, PROTECT, BOR22
FREQ            4_000_000 
[/code]
And I also have
 



[code]
OPTION = $88                                  'interrupt, no prescaler 
[/code]
Thanks for any input

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