STCN75DS2E STMICROELECTRONICS [STMicroelectronics], STCN75DS2E Datasheet - Page 10

• Manufacturer Part Number: STCN75DS2E
• Description: Digital temperature sensor and thermal watchdog
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

2
Note:
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Operation
After each temperature measurement and analog-to-digital conversion, the STCN75 stores
the temperature as a 16-bit two’s complement number (see
selection summary on page
page
●
●
The most recently converted digital measurement can be read from the Temperature
register at any time. Since temperature conversions are performed in the background,
reading the Temperature register does not affect the operation in progress.
The temperature data is provided by the 9 MSBs (Bits 15 through 7). Bits 6 through 0 are
unused.
temperatures. The data is compared to the values in the T
the OS/INT is updated based on the result of the comparison and the operating mode.
The alarm fault tolerance is controlled by the FT1 and FT0 Bits in the Configuration register.
They are used to set up a fault queue. This prevents false tripping of the OS/INT pin when
the STCN75 is used in a noisy environment (see
The active state of the OS/INT output can be changed via the Polarity Bit (POL) in the
Configuration register. The power-up default is active-low.
If the user does not wish to use the thermostat capabilities of the STCN75, the
OS/INToutput should be left floating.
If the thermostat is not used, the T
system data.
for positive numbers S = 0, and
for negative numbers S = 1.
17). The most significant bit (S) indicates if the temperature is positive or negative:
Table 3 on page 14
16) in the 2-byte Temperature register (see
gives examples of the digital output data and corresponding
OS
and T
HYS
registers can be used for general storage of
Table 2 on page
OS
Table 5: Register pointers
and T
13).
HYS
registers, and then
Table 7 on