TMP112 datasheet(24/46 Pages) TI2

24 / 46 page

I/O

Control

Interface

SCL

SDA

Temperature

Configuration

(LOW)

(HIGH)

Pointer

Figure 7-8. Internal Register Structure

Table 7-6 lists the pointer address of the registers available in the TMP112-Q1/TMP112D-Q1 device.Table 7-7

lists the bits of the pointer register byte. During a write command, bytes P2 through P7 must always be 0.

Table 7-6. Pointer Addresses

Temperature register (read only [R])

Configuration register (read-write [R/W])

T(LOW) register (R/W)

T(HIGH) register (R/W)

Table 7-7. Pointer Register Byte

7.5.2 Temperature Register

The temperature register of the TMP112-Q1/TMP112D-Q1 device is configured as a 12-bit read-only register

(setting the EM bit to 0 in the configuration register; see the Extended Mode (EM) section), or as a 13-bit

read-only register (setting the EM bit to 1 in the configuration register) that stores the output of the most recent

conversion. Two bytes must be read to obtain data and are listed in Table 7-8. Byte 1 is the most significant byte

(MSB), followed by byte 2, the least significant byte (LSB). The first 12 bits (13 bits in extended mode) are used

to indicate temperature. The least significant byte does not have to be read if that information is not needed.

Table 7-8. Bytes 1 and 2 of Temperature Register (1)

BYTE

T11

T10

(T12)

(T11)

(T10)

(T9)

(T8)

(T7)

(T6)

(T5)

(T4)

(T3)

(T2)

(T1)

(T0)

(0)

(1)

Extended mode 13-bit configuration shown in parentheses.

7.5.3 Configuration Register

The configuration register is a 16-bit R/W register used to store bits that control the operational modes of the

temperature sensor. Read-write operations are performed MSB first. Table 7-9 lists the format and power-up and

TMP112-Q1, TMP112D-Q1

SLOS887G – SEPTEMBER 2014 – REVISED MAY 2025

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