I have custom board with AD9164.supplies to the Chip are ok .Does AD9164 needs DAC Clock to communicate to SPI port?
I followed the programing sequence as recommeneded by the datasheet. tested this sequence on AD9164_Eval Board successfully.
but on custom board no repsonse from SPI port either read or write. I know there are many things that can be wrong. but if the supplies are correct and power up sequence is correct what else might cuase DAC to not communicate to the FPGA?
Any valuable input and comments in bringing up the DAC AD9164 is welcome.
SPI doesn't need DAC clock to talk to the chip. Could you read back register values 0x003-0x006 and report the values. what SPI settings are using for this communication?
Thank you for your reply. I am using 4 wire SPI communication mode
Trying to set reg x0000 to x18 so that DAC is in 4 wire mode.
but SDO signal line is always high.register range 0x0003 to 0x0006 are all FF.
SDIO,SCLK and CS are all signals are as expected.
There might be a SPI HW issue here. Do you happen to have access to the SPI pins to see if they toggle as expected when you send a command to the DAC?