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ADuC7126what is the value of Tref when I use TEMPREF register value

Question asked by ogura.isao@sankyosha.co.jp on Jun 4, 2018

In the datasheet P44, the single pint calbration is described and I like to use TEMPREF register value to calculate the accurate temperature value. But, in the datasheet, Tref is described as Tref=25degree but is NOT garanteed.

What does this mean? How canI find the correct Tref value to calculate the temperature

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