| SENSOR

TH10 Datasheet

TH10_DataSheet_EN_V1.0

HOPE MICROELECTRONICS CO.,LTD

9

3.5

Measurement Commands for Periodic Data Acquisition Mode

In this mode one issued measurement command yields a stream of data pairs. Each data pair consists of one 16

bit temperature and one 16 bit humidity value (in this order).

In periodic mode different measurement commands can be selected. The corresponding 16 bit commands are

shown in Table 9. They differ with respect to repeatability (low, medium and high) and data acquisition frequency

(0.5, 1, 2, 4 & 10 measurements per second, mps). Clock stretching cannot be selected in this mode.

The data acquisition frequency and the repeatability setting influences the measurement duration and the current

consumption of the sensor. This is explained in section 2 of this datasheet.

If a measurement command is issued, while the sensor is busy with a measurement (measurement durations see

Table 2), it is recommended to issue a break command first (see section 3.8). Upon reception of the break

command the sensor will finish the ongoing measurement and enter the single shot mode.

3.6

Readout of Measurement Results for Periodic Mode

Transmission of the measurement data c an be initiated through the fetch data command shown in Table 10. If no

measurement data is present the I2C read header is responded with a NACK

(Bit 9 in Table10) and the

communication stops. After the read out command fetch data has been issued, the data memory is cleared, i.e.

no measurement data is present

Table 10

3.7

ART Command

The ART (accelerated response time) feature c an be activated by issuing the command in Table 11. After issuing

the ART command the sensor will start acquiring data with a frequenc y of 4Hz.

The ART command is structurally similar to any other command in Table 9. Henc e section 3.5 applies for starting

a measurement, section 3.6 for reading out data and section 3.8 for stopping the periodic data acquisition.

The ART feature can also be evaluated using the Evaluation Kit from HOPERF