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LTC6804 SPI connection to RPi3

Question asked by mahmudsalamati on May 6, 2017
Latest reply on May 12, 2017 by Cuyler

Hello

I'm trying to make SPI connection between LTC6804-1 and Raspberry Pi3 Model B; I'm new to SPI and I encountered with a couple of questions:

1- If I want to make SPI connection through MATLAB, then the speeds that I can set for SPI, start from 500kHz. Is this ok for continuous reading of voltage measurements?
2- In addition to 4 wire connections (SCLK, MISO, MOSI, CS) should I connect grounds of two boards together?
3- I need to use 3.3 volt signals on my RPi3 and because SPI voltages on LTC6804-1 are 5 volts, then I'm going to use resistive divider; is there any special point that I must take into consideration?

Thanks,
Mahmoud

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