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MDP200 Datasheet_V1.3

April 2018

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5.3

Register Map

Every register includes two bytes. The register map is defined as the table below.

Register

Byte Number

Data Definition

Register 0

Byte 0

Differential Pressure High Byte

Byte 1

Differential Pressure Low Byte

Register 1

Byte 2

CRC for Register 0

Byte 3

NA

Register 2

Byte 4

NA

Byte 5

NA

Register 3

Byte 6

NA

Byte 7

NA

Register 4

Byte 8

NA

Byte 9

NA

Register 5

Byte 10

NA

Byte 11

NA

Register 6

Byte 12

NA

Byte 13

NA

Register 7

Byte 14

NA

Byte 15

NA

Register 8

Byte 16

Temperature Sensor Count High Byte(Tcount_Hi)

Byte 17

Temperature Sensor Count Low Byte(Tcount_Lo)

5.4

Command List For Sending To Slave

Table 2 Command List for Sending To Slave

No

Command Name

Data Frame Of Command

Byte

Number

1

Trigger Single

Measurement

0xC1

1

2

Set Slave Address

0xF6

1-byte

i2c_slave_address

1-byte

random

number

3

3

Set Window

Averaging Time

0xFA

1-byte average

time

1-byte

random

number

3

4

Reset MCU

0xFE

1

Note:

1)

Byte number in Table 2 is the number of data bytes slave received, for every command, byte

number must be correct, otherwise, command will not be implemented

2)

The range of I2C slave address is from 0 to 127. If the address has received the value beyond

the range, it will be set as default address 0x31

3)

The range of average time is from 1 to 64, if the time received beyond the range, it will set as

1 default average time 1

4)

Random number means varying data value works

Command Example

0xC1: MDP200 will measure once immediately

0xF6 0x04 0x00: I2C slave address will be changed to 0x04 immediately

0xFA 0x02 0x00: Window averaging time will be changed to 0x02 immediately

0xFE: MCU will reset immediately