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ADS1298 Lead-Off functionality

Other Parts Discussed in Thread: ADS1298

Hello,

 

I'm trying to test the Lead-off functionality on ADS1298 using the MDK board connected to C5505 EVM.

 

In order to test the lead off functionality easily I removed the jumpers from J5 according to the ADS quick start guide document. When I start the sample software and check the status register returned from the chip it contains the following:

00000000110111111111111111100000

According to the datasheet for ADS1298 data format for the status bits is:

1100+ LEAD_OFFP + LEAD_OFFN + GPIO.

It looks like the bits for LEAD_OFFP and LEAD_OFFN are shifted one bit to the left and overwriting the 1100 header. How is this possible?

 

Also, when I return the jumpers in place I'm getting:

00000000110000000001111110000000 instead of: 

00000000110000000000111111000000 (According to the documents: The LOFF_STATM bit7 to bit2 are driven by the WCT amplifiers and hence do not show a LEAD OFF status. 

Which confirms my doubts that the bits are shifted to the left.

Could you take a look at this and tell me what could be wrong? Is there an error in the documents or in the sample code?

 

Cheers,