On the datasheet it said temperature value register is 10 MSB, however OTI and HYST setpoint register is 9 MSB. As I assume this is right.
As shown below OTI setpoint register default is 80.
And HYST setpoint register default is 75.
Later in the article shows:
The conversion formula:
if 9 MSB:
0x4B00 = (0100 1011 0000 0000),
(0100 1011 0) = 150,
150/4 = 37.5
0x5500 = (0101 0101 0000 0000),
(0101 0101 0) = 170
170/4 = 42.5
if 10 MSB:
0x4B00 = (0100 1011 0000 0000),
(0100 1011 00) = 300,
300/4 = 75
0x5500 = (0101 0101 0000 0000),
(0101 0101 00) = 340,
340/4 = 85
It look to me 10 MSB is more reasonable from the calculation above, but OTI setpoint register default still off by 5.
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Also I look at another datasheet for LM75, data on that make much more sense to me (as shown below).
They are 9 MSB instead.
