10.1.6 I²C Communication Sequence Example

This section provides an example of an I²C communication sequence between a microcontroller (the master) and a TLA2024 (the slave) configured with a slave address of 1001 000 to start a single-shot conversion and subsequently read the conversion result.

1. Write the configuration register as shown in Figure 21 to configure the device (for example, write MUX[2:0] = 000, PGA[2:0] = 010, MODE = 1, and DR[2:0] = 110) and start a single-shot conversion (OS = 1):
Figure 21. Write the Configuration Register
2. Wait at least t = 1 / DR ± 10% for the conversion to complete.

Alternatively, poll the OS bit for a 1 as shown in Figure 22 to determine when the conversion result is ready for retrieval. This option does not work in continuous-conversion mode because the OS bit always reads 0.

Figure 22. Read the Configuration Register to Check for OS = 1
3. Then, as shown in Figure 23, read the conversion data register:
Figure 23. Read the Conversion Data Register
4. Start a new single-shot conversion by writing a 1 to the OS bit in the configuration register.

To save time, a new conversion can also be started (step 4) before reading the conversion result (step 3). Figure 24 lists a legend for Figure 21 to Figure 23.

Figure 24. Legend for the I²C Sequence Diagrams