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ADS1293: SPI communication

Part Number: ADS1293

Hi,

I am trying to interface to the ADS1293 through SPI.

The strange thing is that it looks like the ADS is somehow sending 1 bit to few.

If I write 0xFF to any register I only can read back 0xFE.

If I write 0x01 to a register I get 0x01 back.

If I write 0x02 to a register I get 0x02 back.

If I write 0x03 to a register I get 0x02 back!

Has anyone has similar issues with the SPI (I am only running it at 250kHz).