I2C Communication Method During Sleep Mode; Figure 23. Timing Diagram Of Touch Event Occurrences In Sleep Mode; Figure 24. Timing Diagram Of I2C_En Occurrences In Sleep Mode - Abov AT3108U Quick Start Manual

AT3108U Demo board quick start guide
3.5.4

I2C communication method during Sleep Mode

1. If a Touch Event (Touch ON or OFF) is generated in Sleep Mode, the INT output pin releases
Low Pulses. At this point, Active Mode is maintained for the time set in the STOP_DELAY
register. The Touch result value is read using I2C communication (OUTPUT1 to OUTPUT3
Registers).

Figure 23. Timing Diagram of Touch Event Occurrences in Sleep Mode

2. When making I2C communication in Sleep Mode, provide first Low Pulse input to the I2C_EN
pin. At this point, it is recommended to make I2C communication after 100ms based on the
Falling Edge as shown in Figure 24. Active Mode is maintained for the time set in the
STOP_DELAY register based on the Falling Edge.

Figure 24. Timing Diagram of I2C_EN occurrences in Sleep Mode

3. Building and running project
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