Q&A AD7091R-4 Chip Select

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AD7091R-4 Chip Select

Aero_EE on Mar 13, 2019

For a simple SPI bus in which the AD7091R-4 and an FPGA are the only devices on the bus, is it possible to leave CS permanently grounded?

0 jcolao

on Apr 3, 2019 5:56 AM over 1 year ago
Hi Aero_EE,

When reading the conversion result in the AD7091R-4, the MSB data is shifted on the falling edge of CS. The CS edge is needed, CS needs to high after 16th SCLK falling edge to return SDO high impedance.

Regards,

JOnathan
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