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3.3 Checksum Calculation

The 8-bit checksum is calculated from the two previously transmitted data bytes with the algorithm in Table 9.

Property

Value

Name

CRC-8

Width

8 bit

Protected data

read and/or write data

Polynomial

0x31 (x8 + x5 + x4 + 1)

Initialization

0xFF

Reflect input/output False/False

Final XOR

0x00

Example

CRC (0xBEEF) = 0x92

Table 9. Data checksum properties

3.4 I2C Commands

Section

Command

Hex Code

Executable during

Measurement

3.4.1

start_continuous_measurement

0x218B

No

3.4.2

stop_continuous_measurement

0x3F86

Yes

3.4.3

read_measurement

0xEC05

Yes

3.4.4

set_rht_compensation

0xE000

Yes

3.4.5

set_pressure_compensation

0xE016

Yes

3.4.6

measure_single_shot

0x219D

No

3.4.7

enter_sleep_mode

0x3650

No

3.4.8

exit_sleep_mode

0x00

No

3.4.9

perform_conditioning

0x29BC

No

3.4.10

perform_soft_reset

0x06

Yes

3.4.11

perform_factory_reset

0x3632

No

3.4.12

perform_self_test

0x278C

No

3.4.13

enable_testing_mode

0x3FBC

Yes

3.4.14

disable_testing_mode

0x3F3D

Yes

3.4.15

perform_forced_recalibration

0x362F

No

3.4.16

get_product_ID

0x365B

No

Table 10. List of I2C commands