Graphics ClientM User Manual
110120-1000A
40
J18: Headphone Out and Audio Line In
Board connector: dual stack stereo jack, 3.5 mm, CUI SJD-3510-45
Mating connector: 3.5 mm stereo plug
The audio codec included on the GCM provides a stereo headphone
output and audio line input on the dual stack stereo jack J18. The
headphones are wired to the upper socket of the dual stack, while the
audio line in is wired to the lower socket. The diagram at the right
illustrates stereo jack J18. In the following table, pins in the upper
socket are indicated by a “U” and pins in the lower socket are
indicated by an “L”.
The HP_IN input determines the output mode of the on-board audio amplifier. An on-
board pull-down forces this signal low supporting stereo headphones only.
For further details, see
Pin
Name
Pin
Type
Description
1U HP_L
AO
Headphone, left channel
3U HP_IN
Pulled low by on-board resistor
4U HP_R
AO
Headphone, right channel
5U AGND
P
Analog ground
AIN_L
1L
AI
Audio in, left channel
nc
2L
nc
3L
AIN_R
4L
AI
Audio in, right channel (microphone)
AGND
5L
P
Analog ground
J19: Stereo Speaker: Right Channel
Board connector: 2-pin header with friction lock, 0.1-inch, Molex 22-23-2021
Mating connector: Molex 22-01-3027
The GCM drives a stereo speaker on header J17 and header J19. Header J19 provides
the right channel. For details of the operation of the speaker, see
Pin
Name
Type
Description
1
SPKR-
AO
Stereo Speaker, right channel
2
SPKR+
AO
Headphone
Line In
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