19
Atmel AT30TSE002B [DATASHEET]
8711GSEEPR5/12
11.4 Upper Alarm Trip Register (16-bit Read/Write, Address = 02h)
The Upper Alarm Trip Register holds the user programmed upper temperature boundary trip point in 11-bit twos
complement format (0.25癈 resolution) that can be used to monitor ambient temperature in an operating window (See
Table 11-7 and Table 11-8). When the temperature increases above this trip point, or drops below, or is equal to the trip
point (minus any hysteresis set), then the
EVENT pin is asserted (if enabled). This register becomes read-only if the
Alarm Window Lock bit (WINLOCK) bit six in the configuration register is set to a one.
Table 11-7. Upper Alarm Trip Register Bit Distribution
Table 11-8. Upper Alarm Trip Register Bit Description
Bit
15
14
13
12
11
10
9
8
Symbol
RFU
SIGN
ALMWINH
Default Value
0
0
0
0
0
0
0
0
R / W access
R
R
R
R/W
R/W
R/W
R/W
R/W
Bit
7
6
5
4
3
2
1
0
Symbol
ALMWINH
RFU
Default Value
0
0
0
0
0
0
0
0
R / W access
R/W
R/W
R/W
R/W
R/W
R/W
R
R
Bit
Symbol
Description
15:13
RFU
Reserved for Future Use. Read as zero.
12
SIGN
Sign bit:
0 = Ambient temperature is greater than or equal to 0癈.
1= Ambient temperature is less than 0癈.
11:2
ALMWINH
Upper Alarm Trip temperature bits:
Represented in twos complement format.
0:1
RFU
Reserved for Future Use. Read as zero.
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