I have rdac 1 working fine on this pot. Rdac 2 will not work. I'm suspecting that I'm not getting the instruction byte correct. I'm using 16. I've also tried some other values with no response. I just thought I'd get some more experienced eyes to look at it. Any help is really appreciated. I've been working for a long time on this problem and I think I've almost got it working, but I'm missing something.
I have no clue how you get to 16 but I would try 0x80.
I used bits 10000 converted to decimal.
1 to select rdac2
0 to need to midscale reset
0 no need for shutdown
0 no need to activate 01
0 no need to activate 02
Then it says ignore the rest, which seems weird to me, but I had to ignore the last bit to get the master address so it isn't that far fetched I guess.
Where am I wrong? How did you get 0x64? I'm going to try it I'm just wondering what led you to that.
I used bits 10000 converted to decimal.
1 to select rdac2
0 to need to midscale reset
0 no need for shutdown
0 no need to activate 01
0 no need to activate 02Then it says ignore the rest, which seems weird to me, but I had to ignore the last bit to get the master address so it isn't that far fetched I guess.
Ignore means you can use any value but you have to use the complete byte.
I simply used binary 10000000 which equals 0x80.
Where am I wrong? How did you get 0x64? I'm going to try it I'm just wondering what led you to that.
I wrote nothing about 0x64.
I apologize. I responded saying 0x64 was from memory. A bad memory. 
I do appreciate your help and explanation. I killed the chip gotta get another before I can continue.