HS300x-ML1 Datasheet

R36DS0016EU0001 Rev.0.01

Nov 8, 2021

Page 14

5.9

Setting the Measurement Resolution

The HS300x-ML1 series relative humidity and temperature measurement resolutions can be set independently

to 8, 10, 12, or 14-bits by writing to the non-volatile memory, and are initially set to 14 bits by default. The

procedure to set the humidity sensor resolution is illustrated in the following figure. The relative humidity and

temperature resolution can be read in registers 0x06 and 0x11, respectively, or written in registers 0x46 or

0x51. The resolution information is stored in bits [11:10] of these registers, as listed in Table 8. All of the other

bits in these registers must be left unchanged. As such, before writing new resolution settings, the contents of

the read registers must be read, and only bits [11:10] can be changed in the write registers. Once bits [11:10] are

changed to set the desired resolution, the entire register must be written back to the HS300x-ML1 sensor.

Figure 18. Sequence of Commands to Change the Relative Humidity Resolution

Table 8. Register Values for Different Resolution Settings

Resolution Register

Bits [11:10]

Resolution

(Bits)

00B

8

01B

10

10B

12

11B

14

The sensor non-volatile memory requires 120µs to load the data into the registers after step 1, and requires

14ms to write the data after step 4. Failure to comply with these processing times may result in data corruption

and introduce errors in sensor measurements. The procedure to change the temperature sensor resolution is the

same as that displayed in Figure 19, except the register address in Step 1 must be set to 0x11 and the register

address in Step 4 will be 0x51.