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

David,
  The SX can be configured to wake-up when any of the RB pins change state and/or when the watchdog timer times out.
  You would need to setup the rows so that when the "#" key is pressed the state changes on one of the RB Pins.
  OR you could use the watchdog to wakeup the SX and then scan the keys and determine if the "#" is pressed.

  The first method would be the most straight forward and conserve the most power.


  Without a schematic I cannot comment on you other questions.

Bean.

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