I am interfacing to the PMOD Da4 with the ARTY4 A7. I wrote Verilog to write the internal reference register to enable the internal reference right after power up. The internal reference voltage never gets turned on. Attached is the simulation in Vivado which look just like the logic analyzer of the signals. Is there a minimum amount of time that I need to wait after power up for the reference voltage to work? My next thing I was going to try is to slow down the SCLK, but it looks like it meets all timing to me at 50MHz
Or maybe I need to send a reset command on power up before setting the Internal reference? I had this problems with a Maxim ADC in the past, it needed a reset to work correctly because of a bug in the internal reset circuit.
Question
mladenik
I am interfacing to the PMOD Da4 with the ARTY4 A7. I wrote Verilog to write the internal reference register to enable the internal reference right after power up. The internal reference voltage never gets turned on. Attached is the simulation in Vivado which look just like the logic analyzer of the signals. Is there a minimum amount of time that I need to wait after power up for the reference voltage to work? My next thing I was going to try is to slow down the SCLK, but it looks like it meets all timing to me at 50MHz
Or maybe I need to send a reset command on power up before setting the Internal reference? I had this problems with a Maxim ADC in the past, it needed a reset to work correctly because of a bug in the internal reset circuit.
thanks
Link to comment
Share on other sites
15 answers to this question
Recommended Posts
Archived
This topic is now archived and is closed to further replies.