Forum Post: RE: How to use SPI only with ADS1247

Hi Bob,

thanks for your suggestion. I now connected the ADS1247 like follows:

1. DVDD -> +3.3V
2. DGND -> GND
3. CLK -> GND
4. RESET -> +3.3V
5. (unused)
6. (unused)
7. (unused)
8. (unused
9. (unused)
10. (unused)
11. (unused)
12. (unused)
13. AVSS -> GND
14. AVDD -> +3.3V
15. START -> +3.3V
16. CS -> CS@BBB
17. (unused)
18. DOUT -> MISO@BBB
19. DIN -> MOSI@BBB
20. SCLK -> CLK@BBB @ 1MHz

It now works perfectly fine. I think the problem was that I did not connect the START pin. I will also have a look at the ADS1220.

Thanks for your help!

Best regards,
SImon