Hello,
I recently acquired an EVAL-AD7634 board and wish to operate it as stand-alone (serial slave mode), with a TI DSP TMS320F28335 as serial master. I would like to know if it's possible to provide the serial clock from the DSP to the ADC through the pin SCLK (connector P3 pin C7) . In page 3 of the related datasheet states that in this mode, SCLK (slave serial clock) = MCLK, which is a fixed clock frequency of 40MHz provided by oscillator U12.
Thanks in advance.
Gabriel Brunheira
Hi Gabriel,
You can get direct access to the ADC serial interface at the testpoints T3,T4,T5 but you may have to disconnect the traces from the gate array in order to get the desired slave functionality…
Hi Gabriel,
If you want the buffered signals from the FPGA then i would suggest not hooking SCLK directly to T4. You could replace the FPGA 40MHz MCLK with your own continuous clock by removing R49 and…
Hi Gabriel,
I think if you are using a discontinuous clock like with SPI then i would hook the SPI interface directly to the ADC and disconnect the FPGA. The FPGA MCLK is expecting to see a continuous…
