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ADS1298ECGFE-PDK: misunderstanding of ADS1298 transmit data

Part Number: ADS1298ECGFE-PDK
Other Parts Discussed in Thread: ADS1298


I am using TI evaluations boards ADS1298ECGFE-PDK (with ADS1298 component), MMB0 (Modular EVM motherboard)  and software application used in the demonstration document that you can find here  "" .

After computeur application start some data are exchanged on SPI betwen ADS1298 component and MMB0 CPU board. My problem is that ADS1298 is sending data (0x06 on the picture below) in the same time that CPU board start sending a new command (exchange concerning the previous command are finished).Is anybody already met that kind of behaviour and is having the explanation ?


Thank in advance for your help !