User guide

M80 EVB User Guide
M80_EVB_User_Guide_V1.2 - 18 -
Figure 12: Earphone circuit
Figure 13: Earphone interface
3.3.3. Loud speaker
M80 module has embedded a class AB amplifier. It can drive up to 800mW speaker. In this case,
the customer can get good audio performance and eliminate an amplifier simultaneously. The test
points are shown as below.
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