Audio Interfaces - Seco SBC-C57 User Manual

3.3.2 On board WiFi + BT modules
The SBC-C57 board can be equipped with a Dual band (2.4GHz + 5.0 GHz) WLAN 802.11 ac/a/b/g/n + BT 5.0 embedded module, which is an AzureWave Type
NGFF, p/n AW-CM276NF.
This optional WiFi + BT module mounts two U.FL connectors for external antennas, where BT signal is shared with WiFi signal on the Aux antenna connector.
3.3.3

Audio Interfaces

Audio Internal Header
Pin Signal Pin
1 Mic_In2_L 5
2 Mic_In2_R 6
3 Mic_In1_L 7
4 Mic_In1_R 8
TRSS Audio Jack
Pin Signal
TIP Headphone Out Left Channel
RING1 Headphone Out Right Channel
RING2 GND
SLEEVE Mic In
SBC-C57
SBC-C57 User Manual - Rev. First Edition: 1.0 - Author: S.O. - Reviewed by R.Z. - Copyright © 2021 SECO S.p.A.
SBC-C57 mounts on-board a Texas Instrument TLV320 I2S Stereo Audio
CN5
Codec, for high quality audio implementation.
Signal
To give the maximum flexibility to SBC-C57 board, it is available a dedicated 8-
pin 2.54mm pitch Pin header, type Molex p/n 53398-0871, for external
GND
connection of a Line Out output and two Mic In inputs.
Line_Out_L_
Mating connector: MOLEX 51021-0800 receptacle with MOLEX 50079-8000 female crimp
Line_Out_R
terminals.
GND
In order to reduce the space dedicated to connectors, there is a TRRS Combo
CN4
Audio Socket CN4, 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.
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