ADS1299 to Cyton Pins
I was looking at the schematic diagrams and I am a little confused. In the depiction of the ADS1299 (https://github.com/OpenBCI/V3_Hardware_Design_Files/blob/master/OpenBCI Cyton Designs/OBCI_V3_32bit-Schematic.jpg) there is a connection marked "Reserved" which does not exist the the ADS1299 datasheet (https://www.ti.com/lit/ds/symlink/ads1298.pdf?ts=1613539277274&ref_url=https%3A%2F%2Fwww.ti.com%2Fproduct%2FADS1298)
Additionally I would just like to confirm the following connections, please let me know if I got any wrong:
- All digital ground (DGND pins) are set to analog ground.
- TESTP_PACE_OUT1 is SRB1 and TESTN_PACE_OUT2 is SRB2 (what is the second pin of SRB1 and SRB2 connected to?)
- All AVDD's are connected (including AVDD_1)
- All AVSS's are connected (including AVSS_1)
- VREFP is and VREFN are connected to what?
- DOUT is MISO and DIN is MOSI
- What do the four GPIO connect to?
- RLDREF is connected to analog ground
- RLDINV is Bias Inverter
- RLDIN and RLDOUT are combined in Bias driver
- Bias Inverter and Bias driver make up the BIAS pins on the cyton?
- What is WCT connected to?
Comments
Hi sigcraft,
the ADC's datasheet you linked is the one of the ADS1298, which it not the one used by the cyton board.
Instead please refer to the ADS1299 datasheet here.
Godspeed!