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Communication between ADS1298 and MSP430

Weng Kou Chan
Expert 1215 points
Other Parts Discussed in Thread: MSP430F2274, ADS1298

Hi 

I am a student new to programming chips, now I am working with ADS1298 and MSP430F2274.

I have downloaded this code from another thread in this forum. 

ADS1298 code

I have the following questions, please help me to get through.

1. In init_ADS1x9x.c, the default value for Config2 is 0x20, but looking back the datasheet of ADS1298, BIT 5 must always be set to '0', so why the value here is set to 0x20 please?

2. what are we expected to input as device_slot please?

Thanks in advance

  • 0
    TI__Guru**** 181641 points

    Hi Weng,

    1.) In the ADS1298 data sheet, page 47, description of Configuration Register 2, bit 5 controls the chopping frequency of the Wilson Central Terminal.  If bit 5 is set, the chopping frequency is fixed at fmod/16. 

    2.) Regarding the 'slot' - that is in respect to something our market team is developing.  They are putting together a board which can accommodate several different varieties of evaluation modules.  There are four 'slots' on the motherboard where an EVM can be inserted.  Each slot has (essentially) an address associated with it that allows the controller to individually chip select the device at  location (slot) 0, 1, 2 or 3. 

  • 0 in reply to Tom Hendrick
    Expert 1215 points

    Thank you very much, I just realised I am looking at the old version of the datasheet, the SBAS459F –JANUARY 2010–REVISED OCTOBER 2010, which in there the bit 5 is set to be 0.