Roberts II, Charles K. wrote: >> MOVF HV_SetPH && DA_MASK, W ;Changed > > Yep that is what I need. The upper four bits of the 1st world > transmitted to the AD5321 set the Power Down Mode and they must be 0's. > So only the lower bits carry the DAC setting. That is very unlikely what you need. From your description it seems like you really want MOVLW not MOVF here, but I haven't been following the logic. Your instruction will fetch the contents of the location at the address (HV_SetPH && DA_MASK). Is that really what you intended? Speaking of that, you also need to fix the comment. "Changed" isn't telling me anything useful here. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics