STTS424E02BDA3E STMICROELECTRONICS [STMicroelectronics], STTS424E02BDA3E Datasheet - Page 24

• Manufacturer Part Number: STTS424E02BDA3E
• Description: Memory module temperature sensor with a 2 Kb SPD EEPROM
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Temperature sensor registers
4.3
4.3.1
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Temperature register (read-only)
This 16-bit, Read-only register stores the temperature measured by the internal band gap
TS as shown
requirement. When reading this register, the MSBs (Bit 15 to Bit 8) are read first, and then
the LSBs (Bit 7 to Bit 0) are read. The result is the current-sensed temperature. The data
format is 2s complement with one LSB = 0.25°C. The MSB has a 128°C resolution.
The Trip status bits represent the internal temperature trip detection, and are not affected by
the status of the Event or Configuration bits (e.g. Event output control or Clear Event). If
neither of the Above or Below values are set (i.e. both are 0), then the Temperature is
exactly within the user-defined alarm window boundaries.
Temperature format
The 16-bit value used in the Trip Point Set and Temperature Read-back registers is 2s
complement, with the LSB equal to 0.0625°C (see
1.
2.
3.
All unused resolution bits are set to zero. The MSB will have a resolution of 128°C. The
STTS424E02 supports the 0.25°C/LSB only.
The upper 3 bits indicate Trip status based on the current temperature, and are not affected
by the Event output status.
Table 12.
1. See
input
Above
critical
Bit
15
a value of 019Ch represents 25.75°C,
a value of 07C0h represents 124°C, and
a value of 1E74h represents –24.75°C
(1)
Table 13
window
Above
alarm
Temperature register format
Bit
14
inTable
for explanation.
(1)
window
12. The STTS424E02 meets the JEDEC mandatory 0.25°C resolution
Below
alarm
Bit
13
(1)
MSB
Sign
Bit
12
Bit
11
Bit
10
Bit
9
Temperature
Bit
Table
8
Bit
7
13). For example:
Bit
6
Bit
5
Bit
4
Bit
3
LSB
Bit
STTS424E02
2
Bit
1
0
Bit
0
0