Measuring Temperature with the

文章摘要：Step 10. Set the ADC Input for TEMP+ to TEMP-Set the polarity flipper back to normal by clearing the POL bit in the ADC register. Set the ADC positive input multiplexer for TEMP+ by setting MUXP[3:0] to 0x07 in the MUX register. Set the ADC negative multiplexer for TEMP- by setting MUXN[3:0] to 0x00

Measuring Temperature with the,标签：模拟电子技术基础,模拟电子电路,http://www.88dzw.com

Step 10. Set the ADC Input for TEMP+ to TEMP-

Set the polarity flipper back to normal by clearing the POL bit in the ADC register. Set the ADC positive input multiplexer for TEMP+ by setting MUXP[3:0] to 0x07 in the MUX register. Set the ADC negative multiplexer for TEMP- by setting MUXN[3:0] to 0x00 in the MUX register.

Step 11. Measure V_BE2 using the ADC

The V_BE2 voltage is measured from the TEMP+ to the TEMP- inputs to the ADC. The ADC is already configured and only needs to convert to get the resulting V_BE2 voltage. To start the ADC conversion, set the STRT bit in the ADC register. The ADC will do a conversion and the result will be in the DATA register. Read the DATA register value and save as a 16-bit integer named VBE2 for later calculation.

Step 12. Set the ADC Input for V_R2

Set the ADC positive input multiplexer for AGND by setting MUXP[3:0] to 0x09 in the MUX register. Set the ADC negative multiplexer for TEMP- by setting MUXN[3:0] to 0x00 in the MUX register (same as step 5). To measure the TEMP- input relative to AGND, the polarity flipper bit is used. Set the POL bit in the ADC register. The ADC is now setup with TEMP- as its positive input and AGND as its negative input.

Step 13. Measure V_R2 using the ADC

To start the ADC conversion, set the STRT bit in the ADC register. The ADC will do a conversion and the result will be in the DATA register. Read the DATA register value and save as a 16-bit integer named VR2 for later calculation.

Step 14. Set the Current Source for I₃ (64µA)

Set the current source for I₃ by setting the IVAL[1:0] bits to 0x10 in the TEMP_CTRL register.

Step 15. Set the ADC Input for TEMP+ to TEMP-

Set the polarity flipper back to normal by clearing the POL bit in the ADC register. Set the ADC positive input multiplexer for TEMP+ by setting MUXP[3:0] to 0x07 in the MUX register. Set the ADC negative multiplexer for TEMP- by setting MUXN[3:0] to 0x00 in the MUX register.

Step 16. Measure V_BE3 Using the ADC

The V_BE3 voltage is measured from the TEMP+ to the TEMP- inputs to the ADC. The ADC is already configured and only needs to convert to get the resulting V_BE3 voltage. To start the ADC conversion, set the STRT bit in the ADC register. The ADC will do a conversion and the result will be in the DATA register. Read the DATA register value and save as a 16-bit integer named VBE3 for later calculation.

Step 17. Set the ADC Input for V_R3

Set the ADC positive input multiplexer for AGND by setting MUXP[3:0] to 0x09 in the MUX register. Set the ADC negative multiplexer for TEMP- by setting MUXN[3:0] to 0x00 in the MUX register (same as step 5). To measure the TEMP- input relative to AGND, the polarity flipper bit is used. Set the POL bit in the ADC register. The ADC is now setup with TEMP- as its positive input and AGND as its negative input.

Step 18. Measure V_R3 Using the ADC

To start the ADC conversion, set the STRT bit in the ADC register. The ADC will do a conversion and the result will be in the DATA register. Read the DATA register value and save as a 16-bit integer named VR3 for later calculation.

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