Set bit7 (CMODE) of the CR0 (Configuration 0) register to 0 to set MAX31856 to standby mode. In this mode, the device will perform conversions only when bit 6 of Configuration 0 (the 1SHOT bit) is written to a 1.
MAX31856
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The MAX31856 performs cold-junction compensation and digitizes the signal from any type of thermocouple. The output data is formatted in degrees Celsius...
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MAX31856 on Analog.com
Set bit7 (CMODE) of the CR0 (Configuration 0) register to 0 to set MAX31856 to standby mode. In this mode, the device will perform conversions only when bit 6 of Configuration 0 (the 1SHOT bit) is written to a 1.