STTS2002_11 Datasheet, PDF (29/52 Pages) STMicroelectronics – 2.3 V memory module temperature sensor with a 2 Kb SPD EEPROM

STTS2002
Temperature sensor registers
4.7
Temperature resolution register (read/write)
With this register a user can program the temperature sensor resolution from 9-12 bits as
shown below. The power-on default is always 10 bit (0.25 °C/LSB). The selected resolution
is also reflected in bits (4:3) (TRES1:TRES0) of the capability register.
Table 21. Temperature resolution register (TRES) (read/write)
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
0
0
0
0
0
0
Resolution section register
Bit1
Bit0
0
1
Resolution bits
Table 22. TRES details
Bit1
Bit0
0
0
0
1
1
0
1
1
Resolution register bits
°C/LSB
Bits
0.5
9
0.25
10
0.125
11
0.0625
12
Conversion time (max)
65 ms
125 ms (default)
250 ms
500 ms
The default value is 01 for TRES register.
4.8
SMBus timeout
The STTS2002 supports the SMBus timeout feature which is turned on by default. If the
host holds SCL low for more than t_timeout (max), the STTS2002 resets itself and releases the
bus. This feature is supported even when the device is in shutdown mode and when the
device is driving SDA low.
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