Mantech MH-M18 - MH-M18 Module Specifications; MH-M18 Pinout and Interface; MH-M18 MUTE Control Operation; MH-M18 KEY Button Control Features

MH-M18:
The module interface uses a half-hole process, and the customer can directly patch or weld it on the board.
PIN
NAME
FUNCTION
1
KEY
Button control terminal (4 button functions, need to
add additional resistance
2
MUTE
Mute control terminal (output high level 3.3V when
mute, output low level during playback)
3
VCC
Power supply positive pole 5V (short circuit diode
required for 3.7V power supply of lithium battery)
4
GND
GOUND
5
L
LEFT CHANNEL OUTPUT
6
R
RIGHT CHANNEL OUTPUT
MUTE mute control terminal:
used to control the power amplifier board, MUTE output high level 3.3V when mute, output low level during
playback.
KEY button control:
This function can be realized only by connecting additional resistors and buttons.
Volume power-off retention function: The default output is 100% volume. The volume can be increased or
decreased by pressing the button. If the control volume is less than 15%, the volume output is 15% after re-
powering; if the control volume is greater than 15%, the original volume remains unchanged after re-powering.