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Atmel AT30TSE002B [DATASHEET]
8711GSEEPR5/12
11.7.1 Temperature Register Format
This section will clarify the temperature register format and temperature bit value assignments used for temperature for
the following registers: Upper Alarm Trip, Lower Alarm Trip, Critical Alarm Trip, and Temperature Data Registers. The
temperatures expressed in the Upper Alarm Trip, Lower Alarm Trip, Critical Alarm Trip, and Temperature Data Registers
are indicated in twos complement format. In each of the trip registers, bits 12 through bit two are used for temperature
settings, or in the case of the temperature register, holds the internal temperature measurement with bits 12 through bit
one allowing 0.125篊 resolution.
Table 11-15 indicates the temperature registers assigned bit values used for temperature. Table 11-15 below shows
examples for temperature register bit values for various temperature readings.
Table 11-15. Temperature Register Format
Table 11-16. Temperature Register Examples
Bit Position
12
11
10
9
8
7
6
5
4
3
2
1
0
Bit Value
SIGN
128癈
64癈
32癈
16癈
8癈
4癈
2癈
1癈
0.5癈
0.25癈
0.125癈
X
Temperature Register Value Examples
Temperature
Binary (Bit 15 Bit 0)
+125癈
xxx0 0111 1101 00xx
+99.75癈
xxx0 0110 0011 11xx
+85癈
xxx0 0101 0101 00xx
+39癈
xxx0 0010 0111 00xx
+15.75癈
xxx0 0000 1111 11xx
+0.25癈
xxx0 0000 0000 01xx
0癈
xxx0 0000 0000 00xx
-0.25癈
xxx1 1111 1111 11xx
-1癈
xxx1 1111 1110 00xx
-20癈
xxx1 1110 1100 00xx