7.5.2 Temperature Register

The Temperature register of the TMP175 or TMP75 is a 12-bit, read-only register that stores the output of the

most recent conversion. Two bytes must be read to obtain data, and are described in Table 7-6 and Table 7-7.

Byte 1 is the most significant byte, followed by byte 2, the least significant byte. The first 12 bits are used to

indicate temperature, with all remaining bits equal to zero. The least significant byte does not have to be read if

that information is not needed. Following power-up or reset value, the Temperature register reads 0 °C until the

first conversion is complete.

Table 7-6. Byte 1 of the Temperature Register

D7

D6

D5

D4

D3

D2

D1

D0

T11

T10

T9

T8

T7

T6

T5

T4

Table 7-7. Byte 2 of the Temperature Register

D7

D6

D5

D4

D3

D2

D1

D0

T3

T2

T1

T0

0

0

0

0

7.5.3 Configuration Register

The Configuration register is an 8-bit read/write register used to store bits that control the operational modes

of the temperature sensor. Read and write operations are performed MSB first. The format of the Configuration

register for the TMP175 and TMP75 is shown in Table 7-8, followed by a breakdown of the register bits. The

power-up or reset value of the Configuration register are all bits equal to 0.

Table 7-8. Configuration Register Format

D7

D6

D5

D4

D3

D2

D1

D0

OS

R1

R0

F1

F0

POL

TM

SD

7.5.3.1 Shutdown Mode (SD)

The shutdown mode of the TMP175 and TMP75 allows the user to save maximum power by shutting down

all device circuitry other than the serial interface, which reduces current consumption to typically less than 0.1

μA. Shutdown mode is enabled when the SD bit is 1; the device shuts down when the current conversion is

completed. When SD is equal to 0, the device maintains a continuous conversion state.

7.5.3.2 Thermostat Mode (TM)

The thermostat mode bit of the TMP175 and TMP75 indicates to the device whether to operate in comparator

mode (TM = 0) or interrupt mode (TM = 1). For more information on comparator and interrupt modes, see the

High and Low Limit Registers section.

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TMP175, TMP75

SBOS288M – JANUARY 2004 – REVISED DECEMBER 2020

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