Part Number: DAC8554 Tool/software: Code Composer Studio Hi, I'm working the DAC8554 test solution from ATE. From this device, there are A1/A0 for address and DB18/17 for DAC selection. I am trying use the method of datasheet page19, example 2 load new data to DAC A through DACD. At first, I try to code DAC A to DAC D by separate signal, control by pattern. All DAC is working. But the issue is from the re-write the code to "0", somehow the buffer is not working to update the value. Another clue is if the HW pin A1/A0/ENABLE/LDAC set high state before send the signal of 0 code, the 0 code is working and re-write to device. The data is changed only 1 DAC in one time, so the sync pin will goes down and up between 24 clock and few dummy cycle. Another question is if the DACA set with A1/A0, does the code change need to follow DACA with same A1/A0 next time? For example, set A1/A0 "10"(DB23/22 with HW pin A1/A0) and select DACA "00"(DB17/18) and code 2000, when we change the code to 16384, do we need to follow A1/A0 "10" or we can change "00" or "10" or "11"? If there is anyone can share how to use correct setting and change code will be appreciated. Question: 1. Correct code change process 2. Why HW pin A1/A0/ENABLE/LDAC set high can help set code "0" correct. 3. Address and DAC relation
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