TMP112 datasheet(16/44 Pages) TI

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7.4.2 One-Shot Mode

When a 1 is written to the One_Shot bit in the configuration register, the TMP113 immediately starts a one-shot

temperature conversion as shown in Figure 7-4. Requesting another conversion when the TMP113 is performing

a temperature conversion, the device does not stop the active conversion. After completing the one-shot

conversion, the TMP113 enters shutdown mode and the One_Shot bit is set to 1b.

Start of

conversion

Ac ve conversion me

(tACT)

Shutdown

2C One-Shot

Command

Temp_Result

Updated

Figure 7-4. One-Shot Timing Diagram

The one-shot conversion is only supported when the Shutdown bit is set to 1b. Due to the short conversion time,

the TMP113 device achieves a higher conversion rate. A single conversion typically takes 11ms and a read can

take place in less than 80µs. When using the one-shot mode, 50 or more conversions per second are possible.

7.5 Programming

7.5.1 Serial Interface

The TMP113 has a standard bidirectional I2C interface that is controlled by a controller device to be configured

or read the data from TMP113 device. Each target on the I2C bus has a specific device address to differentiate

between other target devices that are on the same I2C bus. Many target devices require configuration upon

start-up to set the behavior of the device. This is typically done when the controller accesses internal register

maps of the target, which have unique register addresses. A device can have one or multiple registers where

data is stored, written, or read. The TMP113 includes 50ns glitch suppression filters, allowing the device to

coexist on an I3C mixed bus. The TMP113 supports transmission data rates up to 3.4MHz.

7.5.2 Bus Overview

The physical I2C interface consists of the serial clock (SCL) and serial data (SDA) lines. The SDA line must be

connected to a supply through a pullup resistor. The size of the pullup resistor is determined by the amount of

capacitance on the I2C lines, the communication frequency and I2C bus voltage. For further details, see the I2C

Pullup Resistor Calculation application note. Data transfer can be initiated by a controller only when the bus is

idle. A bus is considered idle if both SDA and SCL lines are high after a STOP condition or time out events (see

Figure 7-5 and Figure 7-6).

TMP113

SBOSAJ5 – DECEMBER 2024

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