HTS221 datasheet(21/33 Pages) STMICROELECTRONICS

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HTS221

The device contains a set of registers which are used to control its behavior and to retrieve

humidity and temperature data. The register address, made up of 7 bits, is used to identify

and to read/write the data, through the serial interfaces.

7.1

WHO_AM_I (0Fh)

Device identification

This read-only register contains the device identifier, set to BCh

7.2

AV_CONF (10h)

Humidity and temperature resolution mode

To configure humidity/temperature average.

76543210

10111100

76543210

Reserved

AVGT2

AVGT1

AVGT0

AVGH2

AVGH1

AVGH0

[7:6]

Reserved

[5:3]

AVGT2-0: To select the numbers of averaged temperature samples (2 - 256), see Table 16.

[2:0]

AVGH2-0: To select the numbers of averaged humidity samples (4 - 512), see Table 16.

Table 16. Humidity and temperature average configuration

AVGx2:0

Nr. internal average

Noise (RMS)

IDD 1 Hz

Temperature (AVGT)

Humidity (AVGH)

Temp (°C)

rH %

μA

000

0.08

0.4

0.80

001

0.05

0.3

1.05

010

0.04

0.2

1.40

011(1)

1. Default configuration

0.03

0.15

2.10

100

0.02

0.1

3.43

101

128

0.015

0.07

6.15

110

128

256

0.01

0.05

11.60

111

256

512

0.007

0.03

22.50

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