STS30 datasheet(9/17 Pages) ETC2

9 / 17 page

www.sensirion.com

November 2016 - Version 1

9/17

Command

Hex Code

Soft Reset

0x30A2

Table 11 Soft reset command (Clear blocks are controlled

by the microcontroller, grey blocks by the sensor)

Reset through General Call

Additionally, a reset of the sensor can also be generated

using the “general call” mode according to I2C-bus

specification7. This generates a reset which is

functionally identical to using the nReset pin. It is

important to understand that a reset generated in this

way is not device specific. All devices on the same I2C

bus that support the general call mode will perform a

reset. Additionally, this command only works when the

sensor is able to process I2C commands. The

appropriate command consists of two bytes and is

shown in Table 12.

Command

Code

Address byte

0x00

Second byte

0x06

Reset command using the

general call address

0x0006

Table 12 Reset through the general call address (Clear

blocks are controlled by the microcontroller, grey blocks by

the sensor).

Reset through the nReset Pin

Pulling the nReset pin low (see Table 5) generates a

reset similar to a hard reset. The nReset pin is internally

connected to VDD through a pull-up resistor and hence

active low. The nReset pin has to be pulled low for a

minimum of 1 µs to generate a reset of the sensor.

Hard Reset

A hard reset is achieved by switching the supply voltage

to the VDD Pin off and then on again. In order to prevent

powering the sensor over the ESD diodes, the voltage to

pins 1 (SDA), 4 (SCL) and 2 (ADDR) also needs to be

removed.

4.9

Heater

The heater can be switched on and off by command, see

table below. The status is listed in the status register.

After a reset the heater is disabled (default condition).

Command

Hex Code

MSB

LSB

Heater Enable

0x30

Heater Disabled

Table 13 Heater command (Clear blocks are controlled by

the microcontroller, grey blocks by the sensor)

4.10 Status Register

The status register contains information on the

operational status of the heater, the alert mode and on

the execution status of the last command and the last

write sequence. The command to read out the status

the content can be found in Table 16.

Command

Hex code

Read Out of status register

0xF32D

Table 14 Command to read out the status register (Clear

blocks are controlled by the microcontroller, grey blocks by

the sensor)

Clear Status Register

All flags (Bit 15, 10, 4) in the status register can be

cleared (set to zero) by sending the command shown in

Table 15.

Command

Hex Code

Clear status register

0x 30 41

Table 15 Command to clear the status register (Clear

blocks are controlled by the microcontroller, grey blocks by

the sensor)

S General Call Address

Reset Command

General Call 1st byte

General Call 2nd byte

STS30 Datasheet(PDF) 9 Page - List of Unclassifed Manufacturers

STS30 Datasheet(HTML) 9 Page - List of Unclassifed Manufacturers

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

Datasheet Download

Link URL