Datasheet

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Bit position Name Description
23:20 HOT_TEMP_VAL_DEC Decimal part of hot temperature
31:24 ROOM_INT1V_VAL 2’s complement of the internal 1V reference drift at room
temperature (versus a 1.0 centered value)
39:32 HOT_INT1V_VAL 2’s complement of the internal 1V reference drift at hot
temperature (versus a 1.0 centered value)
51:40 ROOM_ADC_VAL 12-bit ADC conversion at room temperature
63:52 HOT_ADC_VAL 12-bit ADC conversion at hot temperature
The temperature sensor values are logged during test production flow for Room and Hot insertions:
• ROOM_TEMP_VAL_INT and ROOM_TEMP_VAL_DEC contains the measured temperature at
room insertion (e.g. for ROOM_TEMP_VAL_INT=25 and ROOM_TEMP_VAL_DEC=2, the
measured temperature at room insertion is 25.2°C).
• HOT_TEMP_VAL_INT and HOT_TEMP_VAL_DEC contains the measured temperature at hot
insertion (e.g. for HOT_TEMP_VAL_INT=83 and HOT_TEMP_VAL_DEC=3, the measured
temperature at room insertion is 83.3°C).
The temperature log row also contains the corresponding 12-bit ADC conversions of both Room and Hot
temperatures:
• ROOM_ADC_VAL contains the 12-bit ADC value corresponding to (ROOM_TEMP_VAL_INT,
ROOM_TEMP_VAL_DEC)
• HOT_ADC_VAL contains the 12-bit ADC value corresponding to (HOT_TEMP_VAL_INT,
HOT_TEMP_VAL_DEC)
The temperature log row also contains the corresponding 1V internal reference of both Room and Hot
temperatures:
• ROOM_INT1V_VAL is the 2’s complement of the internal 1V reference value corresponding to
(ROOM_TEMP_VAL_INT, ROOM_TEMP_VAL_DEC)
• HOT_INT1V_VAL is the 2’s complement of the internal 1V reference value corresponding to
(HOT_TEMP_VAL_INT, HOT_TEMP_VAL_DEC)
• ROOM_INT1V_VAL and HOT_INT1V_VAL values are centered around 1V with a 0.001V step. In
other words, the range of values [0,127] corresponds to [1V, 0.873V] and the range of values [-1,
-127] corresponds to [1.001V, 1.127V]. INT1V == 1 - (VAL/1000) is valid for both ranges.
37.11.8.2.2 Using Linear Interpolation
For concise equations, we will use the following notations:
• (ROOM_TEMP_VAL_INT, ROOM_TEMP_VAL_DEC) is denoted temp
R
• (HOT_TEMP_VAL_INT, HOT_TEMP_VAL_DEC) is denoted temp
H
• ROOM_ADC_VAL is denoted ADC
R
, its conversion to Volt is denoted V
ADCR
• HOT_ADC_VAL is denoted ADC
H
, its conversion to Volt is denoted V
ADCH
• ROOM_INT1V_VAL is denoted INT1V
R
• HOT_INT1V_VAL is denoted INT1V
H
Using the (temp
R
, ADC
R
) and (temp
H
, ADC
H
) points, using a linear interpolation we have the following
equation:
SAM D21 Family
Electrical Characteristics
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001882D-page 1012