AB1561 Headset Reference Design
User Guide
© 2020 Airoha Technology Corp.
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2. MMI Functionality
This section shows the MMI layer functionality. Generally speaking, MMI functions can be partitioned into five
main fields: system; connection; calling; volume; and music. A more in-depth description of each function fields is
given in the function field sections.
Furthermore, the actions for the buttons must be defined in advance. The tap action is defined as a press of the
button of no more than 700 milliseconds. Pressing the button for more than 700 milliseconds is defined as a
“press”.
The beep results must also be well defined. The length of the beeps are described as long, median, and short, and
the beep’s tonality refers to the falling and rising sounds. Every beep result includes a number which describes the
number of times a beep will play.
In the following sections, the components must be used to trigger the functionality. The results indicate that the
functionality is correctly triggered.
2.1. System
Regarding the system function field, the MMI functionalities related to the functions of the EVK itself are classified
in this field, including how to turn on and off the Airoha product, Active Noise Cancellation (ANC), AiroThru, and
how to reset the device to factory settings.
2.1.1. Power
The user can turn the Airoha product on and off.
Table 1. Power
Functionality Actions Results Requirements
Power on Press key1 (Regen) for three seconds
LED0 rapidly flashes three
times
One long beep and the voice
prompt says “Power On”
Power off state
Power off Press key1 (Regen) for three seconds
LED1 rapidly flashes three
times
One long beep and the voice
prompt says “Power Off”
power off, or when
detaching a link or
the EEPROM is
updating
2.1.2. Reset to factory
The user to recover the original Airoha product settings, such as the device name. Only valid after power off.
(Clean paired history, reset volume level, language, device name and PEQ to default setting.)
Table 2. Reset to factory
Functionality Actions Results Requirements
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