Hardware Specification
110120-1000A
21
Audio Inputs: Audio Line In or Microphone
The GCM supports an audio line in or self-powered microphone on stereo jack
. The audio signals run through a low-pass filter before being passed to the
audio codec. The line in ground on J18 connects to an analog ground plane on the GCM
for improved signal-to-noise ratio.
For systems that do not require headphones, stereo jack J18 can be removed and
can be populated providing a mono audio line in only. This
configuration is available as a volume production option.
Audio Outputs: Stereo Speakers and Headphones
The GCM supports stereo speakers on header
The audio amplifier drives the differential outputs directly delivering the output power
required by stereo speakers.
provides a direct connection to stereo headphones. The pull-
down resistors shown in the diagram drain any charge that builds up on the headphone
outputs when headphones are not connected.
Camera Sensor Interface (optional)
As a volume production option, socket
, page
Interface (CSI) supporting camera sensors of up to 3 megapixels. For electrical
specifications, see
Note: The CSI option is mutually exclusive with the USB 2.0 client option
and uses ten of the twelve GPIOs on socket J21. For further details about
these volume production options, see
Summary of Contents for PXA320
Page 62: ...www eurotech com ...