BOLT
UDOO BOLT User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: S.B. - Reviewed by L.V. Copyright © 2019 SECO S.p.A.
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3.3.4
Audio interfaces
In the UDOO BOLT board, audio functionalities are provided by a Realtek ALC888S High Definition Audio Codec.
In order to reduce the space dedicated to connectors, there is a TRRS Combo Audio Socket, i.e. a
single socket which offer both stereo Line Out and Mic In functionalities.
Such TRRS Combo Audio socket can be used with any 4-poles 3.5mm diameter audio jack, with
pinout compatible with the most recent Headsets, shown in the table on the left.
Additionally, it is also possible to connect external stereo speakers by using the dedicated connectors
CN29 and CN30, which are two connectors type HR p/n A2001WV-S-02PD01 or equivalent.
Mating connector: HR p/n A2001H-02P with A2001 series female crimp terminals.
The speaker output available on connectors CN29 and CN30 is Class-D amplified, 3W global power on
4Ohm Load / 1.7W global power on 8Ohm load (recommended).
Furthermore, on the Rear panel Side, there is a combo analogic / digital connector, a TRS 3.5mm
audio socket which integrates also a LED Transmitter for S/PDIF optical connections (Optical 3.5mm
jack). This connector can therefore be used to connect both analog headsets (TRS plug) and digital
audio devices (coaxial optical cable with 3.5mm jack, like in the picture).
TRRS Audio headset jack- CN11
Pin
Signal
TIP
Headphone Out Left Channel
RING1
Headphone Out Right Channel
RING2
MIC-/MIC+
SLEEVE MIC+/MIC-
Right Speaker Connector- CN29
Pin
Signal
1
Speaker Right C
2
Speaker Right Channel -
Left Speaker Connector- CN30
1
Speaker Left Channel -
2
Speaker Left C
TRS Hea S/PDIF -
CN12
Pin
Signal
TIP
Headphone Out Left Channel
RING
Headphone Out Right Channel
SLEEVE GND
