Missing schematic for ReSpeaker 4-Mic Linear Array Kit

info about ReSpeaker series products

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siajeeheng
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Missing schematic for ReSpeaker 4-Mic Linear Array Kit

Post by siajeeheng » Tue Dec 04, 2018 11:21 am

Hi,

I am looking for the schematic for the ReSpeaker 4-Mic linear array kit. The schematic is not available in the wiki. Could you please help?
Reference link:
http://wiki.seeedstudio.com/ReSpeaker_4 ... pberry_Pi/

Thanks

bill.yu
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Re: Missing schematic for ReSpeaker 4-Mic Linear Array Kit

Post by bill.yu » Tue Dec 04, 2018 1:42 pm

Hi there,

Sorry, we do not plan to open source the 4 mics schematic. thanks for understanding.

siajeeheng
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Re: Missing schematic for ReSpeaker 4-Mic Linear Array Kit

Post by siajeeheng » Tue Dec 04, 2018 4:26 pm

Hi,

Could you share the pinout on the 40pin header on the Linear 4-Mic board? i need the pinout information so that i can connect the Linear 4-Mic to another system.

Thanks

seeed techsupport team
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Re: Missing schematic for ReSpeaker 4-Mic Linear Array Kit

Post by seeed techsupport team » Wed Dec 05, 2018 6:12 pm

Hi there,

here is the 40 pins connection. thanks.

Image

siajeeheng
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Re: Missing schematic for ReSpeaker 4-Mic Linear Array Kit

Post by siajeeheng » Thu Dec 06, 2018 10:29 am

Hi,

Thanks for the info. With this limited information, could you help to check my understanding?

I just need to enable the audio 4 channel capture to the Ubuntu system. I don't need the earphone/speaker on the Mic Array kit.
Does it means that i just need to supply the 3.3V to the pin 1?
Do i need to supply 5V to the pin 2?


I will need to program the AC108 codec. So, i believe i need to connect the I2C_SDA to the pin3 and the I2C_SCL to the pin5?
What is the voltage needed by the I2C_SDA and I2C_SCL? (3.3v or 1.8v)?


i will need to provide common ground to the system. Pin 6/9/14/20/25/30/34/39.

I will program the AC108 to master mode. Means that AC108 will supply the PCM_FS and PCM_CLK to my Ubuntu system.
I only interested on Audio capture, so i just need to connect PCM_DAC Pin40 to my Ubuntu I2S_DATA_IN?
The PCM_DAC, PCM_CLK and PCM_FS operate on 1.8V ?

Is there anything i need to connect to the MCLK_EN pin13?

Thanks

bill.yu
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Re: Missing schematic for ReSpeaker 4-Mic Linear Array Kit

Post by bill.yu » Thu Dec 06, 2018 2:51 pm

HI there,

here is the System Diagram. It will help to get better understanding the whole system. thanks.

Image

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