Datasheet

23
Atmel AT30TSE002B [DATASHEET]
8711G–SEEPR–5/12
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 0.125ºC resolution.
Table 11-15 indicates the temperature register’s 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°C 64°C 32°C 16°C 8°C 4°C 2°C 1°C 0.5°C 0.25°C 0.125°C X
Temperature Register Value Examples
Temperature Binary (Bit 15 – Bit 0)
+125°C xxx0 0111 1101 00xx
+99.75°C xxx0 0110 0011 11xx
+85°C xxx0 0101 0101 00xx
+39°C xxx0 0010 0111 00xx
+15.75°C xxx0 0000 1111 11xx
+0.25°C xxx0 0000 0000 01xx
0°C xxx0 0000 0000 00xx
-0.25°C xxx1 1111 1111 11xx
-1°C xxx1 1111 1110 00xx
-20°C xxx1 1110 1100 00xx