ADS8699: ADS8699 change RANGE_SEL_REG

Part Number: ADS8699

• Hi,

   I use ADS8699. My problem is when power on sometimes i can not read adc data from SPI? do we need reset ADS8699 from RST pin after power on?

•  

  My second question about RANGE_SEL_REG. I want to orginize external_ref, and 1000b = 3 × VREF unipolar 0-12.288V

  I send this command from spi;

   

  csADC LOW
  SPI.transfer(0xD4); //11010100
  SPI.transfer(0x14); // 00010100
  SPI.transfer(0x00);
  SPI.transfer(0x48); // int-ref disabled, Voltage range 3*Vref
  csADC HIGH

  If i want to check  RANGE_SEL_REG Register (address = 14h) I send READ_HWORD 

  csADC LOW

  SPI.transfer (0xC8); //11001000//READ_HWORD command
  SPI.transfer(0x14); // 00010100
  SPI.transfer(0x00);
  byte reading=SPI.transfer(0x00); // I expect b01001000 in the reading byte 

  csADC HIGH

  Is it correct? altough  DATAOUT_CTL_REG register is reset value 0x00000000, if I send READ_HWORD command, will I read  RANGE_SEL_REG Register (address = 14h) value?