STTS2002_11 STMICROELECTRONICS [STMicroelectronics], STTS2002_11 Datasheet - Page 25

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

STTS2002
4.4
Note:
A 0.25 °C minimum granularity is supported in all registers. Examples of valid settings and
interpretation of temperature register bits for 10-bit (0.25 °C) default resolution are provided
in
Table 13.
Table 14.
Temperature trip point registers (read/write)
The STTS2002 alarm mode registers provide for 11-bit data in 2s compliment format. The
data provides for one LSB = 0.25 °C. All unused bits in these registers are read as '0'.
The STTS2002 has three temperature trip point registers (see
●
●
●
If the upper or lower boundary threshold values are being altered in-system, all interrupts
should be turned off until a known state can be obtained to avoid superfluous interrupt
activity.
Bit
13
14
15
Table
Alarm temperature upper boundary threshold
Alarm temperature lower boundary threshold
Critical temperature trip point value
Below (temperature) alarm window
– 0 = Temperature is equal to or above the alarm window lower boundary temperature.
– 1 = Temperature is below the alarm window.
Above (temperature) alarm window.
– 0 = Temperature is equal to or below the alarm window upper boundary temperature.
– 1 = Temperature is above the alarm window.
Above critical trip
– 0 = Temperature is below the critical temperature setting.
– 1 = Temperature is equal to or above the critical temperature setting.
13.
Temperature register coding examples (for 10 bits)
Temperature register bit definitions
xxx0 0000 0010 11xx
xxx0 0000 0001 00xx
xxx0 0000 0000 01xx
xxx0 0000 0000 00xx
xxx1 1111 1111 11xx
xxx1 1111 1110 00xx
xxx1 1111 1101 11xx
B15:B0 (binary)
Doc ID 15389 Rev 5
Definition with hysteresis = 0
(Table
18).
(Table
(Table
17), and
16),
Temperature sensor registers
Value
+2.75
+1.00
+0.25
–0.25
–1.00
–2.25
0
Table
15):
Units
°C
°C
°C
°C
°C
°C
°C
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