ACEINNA MFC2030 v1.10

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CONFIDENTIAL

Figure.3 MFC2030 I2C Communication Timing Example

Note: Timing example above shows slave responds to master with 2 bytes data and master sends 1 byte command

to slave respectively.

4. MFC2030

’s Register Map

Table.2 MFC2030 Register Map

Register

Address

Name

Description

Read

Write

0

Flow Rate

MSB

Yes

N/A

0

LSB

Yes

N/A

1

Temperature

MSB

Yes

N/A

1

LSB

Yes

N/A

5. MFC2030

’s Reading Operation

MFC2030 will update its registers every 10 ms interval, so the master can read out data from MFC2030

’s register 0,

1 every 10ms interval.

MFC2030 works as slave, in the first byte it receives, it must include 7-bit slave address(0x31), and a bit which is

either write bit(0) or read bit(1).

To read data from register, master must do writing operation first, which means master must write 1-byte register

address (it specify which address master starts to read from) to slave first, then master do reading operation. There

must be at least 1 ms delay between writing and reading operations.

For example, to read out the data in register 0, there are 2 steps as the following:

(1) Master Writes Register Address

Master should write the register address 0x00 into slave, specifying that master will read from register 0 of slave. As

Table.3 shown, the first byte master sends includes a 7-bit address 0x31 and a write bit 0, the second byte it sends is

register address 0x00.

Table.3 The Data Master Sends while Master Writes Register Address to Slave

Slave address + Write bit

Register Address

0x62 = (0x31<<1) + 0

0x00

(2) Master Reads Data from Slave