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AT30TSE752A/754A/758A [DATASHEET]
Atmel-8854G-DTS-AT30TSE752A-754A-758A-Datasheet_102014
6.2 Temperature Register
The Temperature Register is a 16-bit Read-only Register that stores the digitized value of the most recent temperature
measurement. The temperature data value is represented in the twos complement format, and, depending on the
resolution selected, up to 12 bits of data will be available for output with the remaining LSBs being fixed in the Logic 0
state. The Temperature Register can be read at any time, and since temperature measurements are performed in the
background, reading the Temperature Register does not affect any other operation that may be in progress.
The MSB (bit 15) of the Temperature Register contains the sign bit of the measured temperature value with a zero
indicating a positive number and a one indicating a negative number. The remaining MSBs of the Temperature Register
contain the temperature value in the twos complement format. Table 6-3 details the Temperature Register format for the
different selectable resolutions, and Table 6-4 shows some examples for 12-bit resolution Temperature Register data
values and the associated temperature readings.
Table 6-3. Temperature Register Format
Note: TD = Temperature Data
Table 6-4. 12-bit Resolution Temperature Data/Values Examples
Resolution
Upper Byte Lower Byte
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
12 bits Sign TD TD TD TD TD TD TD TD TD TD TD 0 0 0 0
11 bits Sign TD TD TD TD TD TD TD TD TD TD 0 0 0 0 0
10 bits Sign TD TD TD TD TD TD TD TD TD 0 0 0 0 0 0
9 bits Sign TD TD TD TD TD TD TD TD 0 0 0 0 0 0 0
Temperature
Temperature Register Data
Binary Value Hex Value
+125°C 0111 1101 0000 0000 7D00h
+100°C 0110 0100 0000 0000 6400h
+75°C 0100 1011 0000 0000 4B00h
+50.5°C 0011 0010 1000 0000 3280h
+25.25°C 0001 1001 0100 0000 1940h
+10.125°C 0000 1010 0010 0000 0A20h
+0.0625°C 0000 0000 0001 0000 0010h
0°C 0000 0000 0000 0000 0000h
-0.0625°C 1111 1111 1111 0000 FFF0h
-10.125°C 1111 0101 1110 0000 F5E0h
-25.25°C 1110 0110 1100 0000 E6C0h
-50.5°C 1100 1101 1000 0000 CD80h
-55°C 1100 1001 0000 0000 C900h