STTS2002_11 STMICROELECTRONICS [STMicroelectronics], STTS2002_11 Datasheet - Page 19

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

STTS2002
4.2
4.2.1
4.2.2
4.2.3
4.2.4
Note:
Configuration register (read/write)
The 16-bit configuration register stores various configuration modes that are used to set up
the sensor registers and configure according to application and JEDEC requirements (see
Table 8 on page 19
Event thresholds
All event thresholds use hysteresis as programmed in register address 0x01 (bits 10 through
9) to be set when they de-assert.
Interrupt mode
The interrupt mode allows an event to occur where software may write a '1' to the clear
event bit (bit 5) to de-assert the event Interrupt output until the next trigger condition occurs.
Comparator mode
Comparator mode enables the device to be used as a thermostat. READs and WRITEs on
the device registers will not affect the event output in comparator mode. The event signal will
remain asserted until temperature drops outside the range or is re-programmed to make the
current temperature “out of range”.
Shutdown mode
The STTS2002 features a shutdown mode which disables all power-consuming activities
(e.g. temperature sampling operations), and leaves the serial interface active. This is
selected by setting shutdown bit (bit 8) to '1'. In this mode, the devices consume the
minimum current (I
Bit 8 cannot be set to '1' while bits 6 and 7 (the lock bits) are set to '1'.
The device may be enabled for continuous operation by clearing bit 8 to '0'. In shutdown
mode, all registers may be read or written to. Power recycling will also clear this bit and
return the device to continuous mode as well.
Table 8.
Critical
lock bit
Bit15
RFU
Bit7
Alarm lock
Configuration register format
Bit14
RFU
Bit6
bit
SHDN
and
), as shown in
Table 9 on page
Bit13
Clear
event
RFU
Bit5
Doc ID 15389 Rev 5
Event output
status
Bit12
RFU
Bit4
Table 30 on page
20).
Event output
control
Bit11
RFU
Bit3
41.
Temperature sensor registers
Hysteresis Hysteresis
event only
Critical
Bit10
Bit2
polarity
Event
Bit9
Bit1
Shutdown
mode
Event
mode
Bit8
Bit0
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