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User manual for MERUS™ evaluation boards
EVAL_AUDIO_MA12070_B and EVAL_AUDIO_MA12070P_B
Operating the demonstration board
Figure 2
GUI main window
By default the MA12xx/P will automatically select the relevant power mode (PM1, PM2 or PM3), based on
detection of audio level during operation. The selected power mode is indicated by a blue color in the power
mode indicator.
A set of sliders are available above the power mode indicator. The first slider is used for setting the levels for
transitions between PM1 and PM2. When setting the values at higher levels the transition from PM1 to PM2 will
occur at a higher output power level. The second slider is used in the same way, for transitions between PM2
and PM3.
Power mode profiles can be selected in the "Power Mode Profile Select" section. This gives a specific profile to
the amplifier for optimization on low idle power consumption, audio performance or EMI. Please refer to the
specific device datasheet for more detailed information on power mode profiles.
The "Digital Audio Processor" button is for digital input (I
I
S configuration. Note that the digital audio processor part of the GUI can only be used with MA12070P devices.
2
3.5
Start sequence
Important – GUI software revisions: The current GUI software version is 6.5.0. Please note that the current GUI
only accepts I
C address 0x20.
2
3.6
Analog input configuration (MA12070 devices)
Follow this (recommended) sequence to start the EVK:
1. Make sure toggle buttons are in "shutdown" and "mute" positions.
2. Connect all cables, including the PC by USB cable.
3. Make sure active analog audio source is connected.
4. Turn on the PVDD supply.
5. Start the board by setting the toggle switch to the "enable" position.
User Manual
S) use and will be discussed in the start-up section for
2
10 of 23
V 1.0
2023-03-02
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