AB1561 Headset Reference Design
User Guide
© 2020 Airoha Technology Corp.
This document contains information that is proprietary to Airoha Technology Corp. (“Airoha”) and/or its licensor(s).
Any unauthorized use, reproduction or disclosure of this document in whole or in part is strictly prohibited.
3. MMI Event
This section shows the events that are not triggered by pressing the button, but are instead triggered by other
devices or the Airoha product itself. These events are divided into three types: connection, battery, and time out.
3.1. Connection
This section shows all events related to connections, such as successfully pairing, being connectable and being
connected.
Table 28. Connection event
Event Results
Pairing successfully LED0 rapidly flashes five times
Connectable LED1 flashes every 2.06 seconds (light-on 0.06s, light-off 2s)
Connected LED1 flashes every 5.46 seconds (light-on 0.06s, light-off 5.4s)
Discoverable LED1 flashes every 1 seconds (light-on 0.5s, light-off 0.5s)
Note: If the Airoha product is connectable, it can only be connected to but it is not discovered.
Note: The connected event here is for situations in which it is both fully connected and not connected.
3.2. Battery
This section shows the battery events including low battery and charging.
Table 29. Battery event
Event Results
Low battery LED0 periodically flashes for two seconds
Charging LED0is always on during charging
3.3. Time out
There are three different time out mechanisms for the Airoha product: connectable time out; pairing mode time
out; and auto power off. This section shows each of these time out mechanisms.
Table 30. Time out event
Event Results
Connectable time out Connectable state is disabled after 10 minutes
Pairing mode time out The pairing mode times out after 5 minutes when the Airoha product is not connected or
discoverable state is removed
Auto power off The Airoha product turns off after 30 minutes of inactivity
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