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Custom board for wrist based HR monitoring

Category: Hardware
Product Number: MAX32664

Hi, I am designing a custom board for measuring wrist-based heart rate and pulse oximetry using max32664C. I wanted to know;

  1. Does the max32664C chip come pre-programmed from the factory with the default firmware for wrist-based monitoring  or do i have to flash it in myself?
  2. In choosing the accelerometer for motion compensation, is the kx122 still a good choice? I am however considering using the LIS2DS12 as kx122 has been flagged not suitable for new designs. 
  3. If I do decide to go with LIS2DS12, does the chip support it on the fly or is there any special configuration I have to do to the firmware to get it working.

Thanks in advance.