We're using the SPI standard specified by Intan tech.
See the full documentation here http://www.intantech.com/files/Intan_RHD2000_SPI_cable.pdf
The current standard has 2 MISO (headstage->computer) data lines, so it's possible to connect 2 headstages to one of the 4 inputs on the acquisition board via one cable by using a Y-adapter.
This also means that it is easy to design a 64 channel headstage using two RHD chips.
For future expansions, it's possible to simply add more omnetics connector rows on the end of the connector.
This also means that it is easy to design a 64 channel headstage using two RHD chips.
For future expansions, it's possible to simply add more omnetics connector rows on the end of the connector.
...
The documentation for the Open Ephys Acquisition board has been moved to: https://open-ephys.github.io/acq-board-docs/