In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Peter Van der Zee wrote:

Phil, your arguments are sound, but the practical experience regarding input leakage is that it is NIL, although not guaranteed to be so for every chip.

Under the optimum connections, including a high impedance on MCLR, and programming all port bits (including the upper 4 RA on my SX48) as outputs, the sleep current is ZERO microamps. In my case this is an important capability of the SX48. It seems the reason a 1 Meg pullup is too large is that it comes out of reset too slow, and may not start up reliably. More testing to be done here!

Occasionally I use 33 to 100K, and have not experienced any errant resets.

Cheers,

Peter (pjv)

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