Hi, Arpad; I think your second table is also correct. I just want to point out that the current BIRD explicitly states that if GetWave_Exists=False, Use_Init_Output must be True. Although it won't change the logic of the table, those X's for Use_Init_Output when GetWave_Exists=False should be replaced by True. Regards, Fangyi From: ibis-macro-bounce@xxxxxxxxxxxxx [mailto:ibis-macro-bounce@xxxxxxxxxxxxx] On Behalf Of Muranyi, Arpad Sent: Tuesday, April 27, 2010 10:57 PM To: ibis-macro@xxxxxxxxxxxxx Subject: [ibis-macro] Truth table taken to the next level Dear AMI experts, I cleaned up the spreadsheet with the truth table that we discussed in our ATM meeting today. It looks like this now: I hope I got it right this time. The next thing I would like to do is to extend this table and spell out how these conditions can be applied to Tx and Rx independently. In other words, I don't believe that our intent was to require these Booleans to be the same for both Tx and Rx. But how many combinations are valid? We have four (4) combinations per buffer, and we have two buffers, which could theoretically allow 4^2 = 16 total possibilities. Are they all valid? Thanks, Arpad ============================================================