22
Atmel AT30TSE002B [DATASHEET]
8711GSEEPR5/12
11.7 Temperature Register (16-bit Read-only, Address = 05h)
The Temperature Register holds the internal temperature measurement data represented in 11-bit twos complement
word format allowing for resolution equal to 0.125癈 (least significant bit). The upper three bits (15, 14, and 13) of the
temperature register indicates the trip status of the current temperature and most important, are not affected by the
status of the output of the
EVENT pin (See Table 11-13 and Table 11-14).
Table 11-13. Temperature Register Bit Distribution
Table 11-14. Temperature Register Bit Description
Bit
15
14
13
12
11
10
9
8
Symbol
CRITHIGH
ALMHIGH
ALMLOW
SIGN
128癈
64癈
32癈
16癈
Default Value
0
0
0
0
0
0
0
0
R / W access
R
R
R
R
R
R
R
R
Bit
7
6
5
4
3
2
1
0
Symbol
8癈
4癈
2癈
1癈
0.5癈
0.25癈
0.125癈
RFU
Default Value
0
0
0
0
0
0
0
0
R / W access
R
R
R
R
R
R
R
R
Bit
Symbol
Description
15
CRITHIGH
0 = Ambient temperature is less than the Critical Alarm Trip Register setting.
1 = Ambient temperature is greater than or equal to Critical Alarm Trip Register setting.
When this bit is set one, it will automatically clear once the measured temperature decreases below
or is equal to the trip point minus any hysteresis set.
14
ALMHIGH
0 = Ambient temperature is below the Upper Alarm Trip register setting.
1 = Ambient temperature is above the Upper Alarm Trip register setting.
When the bit is set one, it will automatically clear once the measured temperature decreases below
or is equal to the trip point minus any hysteresis set.
13
ALMLOW
0 = Ambient temperature is above the Lower Alarm Trip register setting.
1 = Ambient temperature is below the Lower Alarm Trip register setting.
When the bit is set one, it will automatically clear once the measured temperature increases above or
is to equal to the trip point.
12
SIGN
Sign bit:
0 = Ambient temperature is greater than or equal to 0癈.
1 = Ambient temperature is less than 0癈.
11:1
TEMP
Ambient Temperature bits:
Represented in twos complement format.
The encoding of bits B11 through B2 is the same as in the Alarm Trip Registers.
0
RFU
Reserved for Future Use. Read as zero.
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