Thank you very much for your answer. It has been really helpful.
In the case of this post they are connecting the McASP to the serial interface of the ADS8556 ( which has a special signal for the Frame Sync):
http://e2e.ti.com/support/dsp/tms320c6000_high_performance_dsps/f/115/t/114403.aspx
If I understood it correctly they are interconnecting the devices this way:
DSP McASP ADS8556
AXR1[x] <-- SDOA
AXR1[y] < -- SDOB
AXR1[z] < -- SDOB
AXR1[w] ---> SDI
AFSX ----> CS/FS
ACLKX ----> SCLK
If that's correct I have a couple of questions in order to select the best ADCs for our application
- I guess not but just in case: Could it be connected to another ADC without Frame Sync signal (for example the ADS1258) using just the CS?
- Is there any other ADC with the characteristics(24bits,>=2Ksps) we are looking for and Frame Sync signal?
Thank you,
Carlos