STTS2002_11 STMICROELECTRONICS [STMicroelectronics], STTS2002_11 Datasheet - Page 21

• Manufacturer Part Number: STTS2002_11
• Description: 2.3 V memory module temperature sensor with a 2 Kb SPD EEPROM
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

STTS2002
Table 9.
1. As this device is used in DIMM (memory modules) applications, it is strongly recommended that only the active-low polarity
2. The actual incident causing the event can be determined from the read temperature register. Interrupt events can be
3. Writing to this register has no effect on overall device functioning in comparator mode. When read, this bit will always
Figure 8.
1. T
2. T
3. HYS = Absolute value of selected hysteresis
Table 10.
15:11
10:9
Bit
(default) is used. This will provide full compatibility with the STTS424E02. This is the recommended configuration for the
STTS2002.
cleared by writing to the clear event bit (writing to this bit will have no effect on overall device functioning).
return a logic '0' result.
H
L
= Value stored in the alarm temperature lower boundary trip register
= Value stored in the alarm temperature upper boundary trip register
Clears
Hysteresis enable (see
– 00 = Hysteresis is disabled (default)
– 01 = Hysteresis is enabled at 1.5 °C
– 10 = Hysteresis is enabled at 3 °C
– 11 = Hysteresis is enabled at 6 °C
Hysteresis applies to all limits when the temperature is dropping below the threshold so that once the
temperature is above a given threshold, it must drop below the threshold minus the hysteresis in order to be
flagged as an interrupt event. Note that hysteresis is also applied to the EVENT pin functionality. When
either of the lock bits is set, these bits cannot be altered.
Reserved for future use. These bits will always read ‘0’ and writing to them will have no effect. For
future compatibility, all RFU bits must be programmed as ‘0’.
Sets
Above Window bit
Below Window bit
Configuration register bit definitions (continued)
Hysteresis
Hysteresis as applied to temperature movement
Temperature slope
T H
T L
Falling
Rising
Figure 8
Below alarm window bit
and
Table
Doc ID 15389 Rev 5
Temperature
10)
threshold
T
L
Definition
- HYS
T
L
T H - HYS
Temperature slope
Falling
Rising
Above alarm window bit
Temperature sensor registers
T L - HYS
Temperature
threshold
T
H
T
- HYS
H
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