DataSheet

HP203B

HP203B_DataSheet_EN_V2.0

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4. 2.9 Read the Control Registers

.READ_REG (0x80+ register address)

This command allows the user to read out the control registers.

4. 2.10 Write the Control Registers

.WRITE_REG (0xc0 + register address)

This command allows the user to write in the control register

Table6: The Command Set

Name

Hex Code

Binary Code

Descriptions

SOFT_RST

0x06

0000 0110

Soft reset the device

ADC_CVT

NA

010_OSR_chnl

Perform ADC conversion

READ_PT

0x10

0001 0000

Read the temperature and pressure values

READ_AT

0x11

0001 0001

Read the temperature and altitude values

READ_P

0x30

0011 0000

Read the pressure value only

READ_A

0x31

0011 0001

Read the altitude value only

READ_T

0x32

0011 0010

Read the temperature value only

ANA_CAL

0x28

0010 1000

Re-calibrate the internal analog blocks

READ_REG

NA

10_addr

Read out the control registers

WRITE_REG

NA

11_addr

Write in the control registers

5. I²C Interface

The I²C interface is fully compatible to the official I²C protocol specification. All the data are sent

starting from the MSB. Successful communication between the host and the device via the I²C bus

can be done using the four types of protocol introduced below.

5.1 I²C Specification

Table7: I²C Slave Timing Values

Parameter

Symbol

I²C

Unit

Condition

Min

Typ.

Max

SCL Clock Frequency

Pull-up = 10 kΩ

0

100

400

kHz

Bus free time between STOP and START

condition

1.5

µs

Repeated START Hold Time

0.6

µs

Repeated START Setup Time

0.6

µs

STOP Condition Setup Time

0.6

µs

SDA Data Hold Time

100

ns

SDA Setup Time

100

ns

SCL Clock Low Time

1.5

µs

SCL Clock High Time

0.6

µs

SDA and SCL Rise Time

30

500

ns

SDA and SCL Fall Time

30

500

ns