FS3000 Datasheet

R36DS0009EU0100 Rev.1.00

May 31, 2022

Page 9

5.2

Digital Output Measurements

The FS3000 continuously measures during operation. The data is sent in byte packages. Each byte is followed

by an ACK from the slave. The most significant bit (MSB) is transmitted first.

To read the data, the following command is sent to the FS3000.

After the START bit, the master device sends the 7-bit slave address followed by an eighth bit = 1 (READ). The

READ bit indicates a transmission from the FS3000 (slave) to master (see Figure 6).

The checksum used for data integrity is returned from the FS3000 followed by the two bytes of flow data.

The flow data is a 12-bit integer. Only the least significant four bits in the high byte are valid (see Figure 7).

Figure 6. Flow Data Read Command

Figure 7. Flow Data from FS3000

S START Condition

R READ Mode

P STOP Condition

6

5

4

3

2

1

0

S

0

1

0

1

0

0

Byte

Device Slave Address (0x28), [6:0]