HTS221

• Generated with MrT Device Utility

• Bus: I2C

• RegMap: Register Map

• Datasheet: https://www.st.com/conte…

• DigiKey: 497-15382-1-ND

• I2C Address: 0xBE

Description

Humidity and Temperature Sensor

Register Map

Name	Address	Type	Access	Default	Description
WHO_AM_I	0x0F	uint8	R	0xBC	Id Register
AV_CONF	0x10	uint8	RW	0x1B	Humidity and temperature resolution mode
CTRL1	0x20	uint8	RW	0x00	Control register 1
CTRL2	0x21	uint8	RW	0x00	Control register 2
CTRL3	0x22	uint8	RW	0x00	Control register 3
STATUS	0x27	uint8	R	0x00	Status register
HUMIDITY_OUT	0x28	int16	R	0x0000	Relative humidity data
TEMP_OUT	0x2A	int16	R	0x0000	Temperature data
H0_rH_x2	0x30	uint8	R	0x00	Calibration data
H1_rH_x2	0x31	uint8	R	0x00	Calibration data
T0_DEGC_x8	0x32	uint8	R	0x00	Calibration data
T1_DEGC_x8	0x33	uint8	R	0x00	Calibration data
T1T0_MSB	0x35	uint8	R	0x00	Calibration data
H0_T0_OUT	0x36	int16	R	0x0000	Calibration data
H1_T0_OUT	0x3A	int16	R	0x0000	Calibration data
T0_OUT	0x3C	int16	R	0x0000	Calibration data
T1_OUT	0x3E	int16	R	0x0000	Calibration data

Registers

---

WHO_AM_I

Address:

[0x0F]

Default:

[0xBC]

Id Register

Bit	7	6	5	4	3	2	1	0
Field

Fields

WHO_AM_I:

Id Register

---

AV_CONF

Address:

[0x10]

Default:

[0x1B]

Humidity and temperature resolution mode

Bit	7	6	5	4	3	2	1	0
Field		AVGT			AVGH

Fields

AVGH:

Selects the number of Humidity samples to average for data output

Name	Value	Descriptions
4	b000	4 samples
8	b001	8 samples
16	b010	16 samples
32	b011	32 samples
64	b100	64 samples
128	b101	128 samples
256	b110	256 samples
512	b111	512 samples

AVGT:

Selects the number of Temperature samples to average for data output

Name	Value	Descriptions
2	b000	2 samples
4	b001	4 samples
8	b010	8 samples
16	b011	16 samples
32	b100	32 samples
64	b101	64 samples
128	b110	128 samples
256	b111	256 samples

---

CTRL1

Address:

[0x20]

Default:

[0x00]

Control register 1

Bit	7	6	5	4	3	2	1	0
Field					BDU	ODR

Flags

PD:

power down mode

BDU:

Block Data update. Prevents update until LSB of data is read

Fields

ODR:

Selects the Output rate for the sensor data

Name	Value	Descriptions
ONESHOT	b00	readings must be requested
1HZ	b01	1 hz sampling
7HZ	b10	7 hz sampling
12_5HZ	b11	12.5 hz sampling

---

CTRL2

Address:

[0x21]

Default:

[0x00]

Control register 2

Bit	7	6	5	4	3	2	1	0
Field						HEATER	ONESHOT

Flags

BOOT:

Reboot memory content

HEATER:

Enable intenal heating element

ONESHOT:

Start conversion for new data

---

CTRL3

Address:

[0x22]

Default:

[0x00]

Control register 3

Bit	7	6	5	4	3	2	1	0
Field

Fields

CTRL3:

Control register 3

---

STATUS

Address:

[0x27]

Default:

[0x00]

Status register

Bit	7	6	5	4	3	2	1	0
Field						HUM_READY	TEMP_READY

Flags

TEMP_READY:

indicates that a temperature reading is ready

HUM_READY:

indicates that a humidity reading is ready

---

HUMIDITY_OUT

Address:

[0x28]

Relative humidity data

Bit	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Field

Fields

HUM_OUT:

Current ADC reading for humidity sensor

---

TEMP_OUT

Address:

[0x2A]

Temperature data

Bit	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Field

Fields

TEMP_OUT:

Current ADC reading for temperature sensor

---

H0_rH_x2

Address:

[0x30]

Calibration data

Bit	7	6	5	4	3	2	1	0
Field	H0_rH_x2

---

H1_rH_x2

Address:

[0x31]

Calibration data

Bit	7	6	5	4	3	2	1	0
Field	H1_rH_x2

---

T0_DEGC_x8

Address:

[0x32]

Calibration data

Bit	7	6	5	4	3	2	1	0
Field	T0_DEGC_x8

---

T1_DEGC_x8

Address:

[0x33]

Calibration data

Bit	7	6	5	4	3	2	1	0
Field	T1_DEGC_x8

---

T1T0_MSB

Address:

[0x35]

Calibration data

Bit	7	6	5	4	3	2	1	0
Field	T1T0_MSB

---

H0_T0_OUT

Address:

[0x36]

Calibration data

Bit	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Field	H0_T0_OUT

---

H1_T0_OUT

Address:

[0x3A]

Calibration data

Bit	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Field	H1_T0_OUT

---

T0_OUT

Address:

[0x3C]

Calibration data

Bit	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Field	T0_OUT

---

T1_OUT

Address:

[0x3E]

Calibration data

Bit	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Field	T1_OUT