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

One thing to consider is that noise immunity on the /MCLR pin decreases as the pullup resistor value increases. With a 100K pullup resistor, an external noise source would have to induce only a 40uA current to pulse the pin to 1V, which would reset the chip. With a 10K resistor, this increases to 0.4mA. I'd be hesitant to use higher than a 22K resistor here, 10K being preferable.

Input leakage current on all pins is spec'd at 1uA max, so the pullup value is virtually irrelevant to the overall power consumption.

-Phil

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