Reference Manual

Hardware Reference Manual
Version 1.0 - 53 - eInfochips Confidential
E1.12
VDD_2V5_ETHERNET
2.5V Supply
E1.13
GPIO4/LED4
GPIO -4 Pin
E1.14
VDD_2V5
2.5V Supply(Yellow Led anode)
E1.15
GPIO0/LED0
GPIO -0 Pin
E1.16
VDD_2V5
2.5V Supply(Orange Led anode)
E1.17
ETH_SHEILD_GND
Shield Ground
E1.18
ETH_SHEILD_GND
Shield Ground
E1.19
ETH_SHEILD_GND
Shield Ground
E1.20
ETH_SHEILD_GND
Shield Ground
Table 18: IO Card Ethernet (E1) Pinout
6.3.8 Audio Interface
ERAGON660 kit can support two audio codecs; WCD9335 is externally connected to IO Card as a
daughter board and second is PMIC’s internal codec. By default SBC will have connect with internal
PMIC audio codec. SBC have two on board DMIC and connect the speaker on connector (J11).
Connect Speaker Positive terminal of Speaker to J11.1 pin and Speaker Negative to J11.2 pin.
Figure 17 – SBC Speaker connector (J11)
To use the WCD9335 SBCe register DNP on SBC and WCD9335 daughter board connected to the IO
Card card at connectors J20 and J21. This daughter board also has WSA8810 audio amplifier interfaced
with codec.
ERAGON660 IO card supports 5 analog MICs,1 headset MIC, 3 Digital MICs, 2 stereo speaker outputs,
1 headset output, 1 Earpiece output, 2 Line outputs and all these peripherals excluding can be
connected on headset connector J19, Female headers J24 & J22.
For more information about Audio Codec Selection and Related change in SBC (Single Board
Computer), see the Eragon660_SBC_Audio_Codec_Selection_Guideline_Rev1.0.
Figure 18 – IO Card WCD9335 Audio Code Daughter Board