TMP468: About TMP468 register some questions

Hi Meican,

Below is my feedback on your inquiries.

1. what;s difference  between Remote Temperature 1 ( RESISTER 0x81)  and Remote Temperature 1 ( RESISTER 0x01) ?

Register 0x81 can be used for block reading the temperature registers.  This means that the register pointer will automatically increment to the next register.  See Figure 18 in the datasheet for single word read (register 0x01 use case) and Figure 19 and 20 for multiple word read (Register 0x81 use case).  If the pointer is already set to where you want to start reading you can use Figure 20, if not the pointer needs to be set as shown in Figure 19 in the datasheet.  

Please read 7.5.1.4.2 Block Register Reads and 7.6.1.12 Block Read - Auto Increment Pointer for more info.

2.  How to use Remote Temperature η-Factor Correction  ( RESISTER 0x41) ?   have a example?

Using equation 3 in the datasheet you can write to the η-Factor Correction registers to adjust for remote transistors that have η-factors different than the default of 1.008.  For example if the n-factor of the transistor is 1.004153 using equation 3 you will set the η-Factor Correction register to 0x08.  

Please read section 7.6.1.8 in the datasheet for more info.  

3. How to use Remote Temperature 8 Offset   ( RESISTER 0x78) ?  have a example?

Please read section 7.6.1.9 in the datasheet 

Example: For precision calibration the user wants to offset the remote temperature .25C higher than the read value the offset register can be set to 0x0020

Thanks,