User's Manual

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FIBOCOM B830-GL Hardware User Manual_HP Customization Version Page 20 of 29
Volume Level
nRF52840 Pin
V
PP
Voltage
P0.07
P1.15
P1.14
1(Mute)
H
NC
NC
-0.3
～
0.3V, typical 0V
2(Normal)
H
H
L
13.5~17.5V, typical 15.5V
3(Medium)
H
L
H
20.5~24.5V, typical 22.5V
4(Loud)
H
H
H
28~32V, typical 30V
The typical volume value of piezo on module is 100dB@Level 4(background noise is lower than 40dB).
The sound test environment in audio lab is as Figure 3-5:
Figure 3-5 Sound Test Environment