In our previous article we have read the temperature from the MIPI I3C SDR device NXP P3T1755DP/Q900Z temperature sensor in this article we will show how to convert the negative values of these temperature readings.
If the MSB of the temperature register is 1 then the data is interpreted as 2s complement and the conversion is as follows.
Temp value (°C) = -(two’s complement of Temp data and adding one) x 0.0625 °C
Example: 1110 0111 000:
Two’s complement and adding one: 0001 1000 1111+1 = 0001 1001 0000 = 190h = 400
Temp = - 400 x 0.0625 °C = -25 °C
These NXP P3T1755DP/Q900Z temperature sensor devices are available in TSSOP8 packages,
and can be attached to these 8TSSOP/8MSOP TO 8DIP adapters for prototypes
with an example shown below (in breadboard),
Please consider the device specification recommendations for proper operation.
Have a great day!
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