ACEINNA MFC2030 v1.10

Page 7 of 8

CONFIDENTIAL

As Table.4 below shown, after slave receives a 7-bit address 0x31 and a read bit 1 from master, if slave

’s SCL pin

receives pulses of 2 bytes data generated by master, accordingly the slave

’s SDA pin will return 2 bytes flow data as

Table.5 shown.

Table.4 The Data and Pulses Master Sends while Master Reads Data from Slave

Slave Address + Read bit

Pluses of 2 Bytes

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

High Byte, Low Byte

Table.5 The Data Slave Returns while Master Reads Data from Slave

High Byte

Low Byte

Notes:

a.

‘0x’ means that the data mentioned in this note is hexadecimal.

b.

‘<<’ means data shifts left.

c. Slave returns the high byte first, then the low byte.

d. If you want to read temperature data from register 1, just change the register address as 0x01 as step (1), and

then finish the step (2).

e. There must be at least 10ms time delay between any two register reading operations, otherwise, the data will not

be updated.

f. Any other registers are not available for customer, if you write any data to any register we didn

’t mention in this

note, it probably cause MFC2030

’s firmware broken!

6. Data Format

The output data of register 0 is 16-bit signed integer data, which is from -32000 to 32000 sccm.

The output data of register 1 is 16-bit signed integer data, which needs to be divided by 10 to get the measured

temperature (Unit: Celsius Degree).