Hi everyone!
Hope everybody is doing fine.
I need some guidance on DAC8775EVM board, I am trying hard to get the output from the board but still getting failed. No output at all, only zero volt on Channel A, B, C and D.
Right now I am sending this following sequence of data register to DAC8775 using SPI protocol implemented in VHDL. I am using SCK, CS, and MOSI lines only to J1 connector on DAC8775EVM.
1) 0x01 0001 -- reset
2) 0x02 1E11 -- internal ref vol enable
3) 0x06 000F -- buck boost select
4) 0x07 021F -- config buck boost
5) 0x03 01F0 -- select DAC register
6) 0x04 1000 -- Config DAC register
7) 0x05 FFFF -- to DAC Data register
next what should I check to find out the error, please give some deep insight since no output at all is coming. I have given supply at J2 AVDD 12v and externally DVDD 3.3V at J4.
DVDD jumper setting is fine as far I think, and rest jumper settings I am unaware of whether they are required to get output or not. There are jumper 12, 15 and 14 for clear , LDAC and RESET respectively. So to get output how should I set it? Since I can give Hardware reset that is why I did not add it in my FPGA SPI. Next How should I use this CLEAR jumper 12? I need idea on this also.
and any further setting requirement is there please let me know, I need to operate this DAC board using FPGA,
Help would be highly appreciated.
if any helpful resource is there then please guide me.
Thanking you.
