i.MX6 SSI and AUDMUX

[宗標廖]

Hello,Community

According to IMX6DQRM, there are only 3 SSI interfaces on i.MX6D/Q processor,but now I want to connect 4 audio devices to i.MX6,what should I do?

Thank you!

ZongbiaoLiao

[igorpadykov]

Hi ZongbiaoLiao

  default BSP(L3.0.35_4.1.0) does not support this

suggest to look at sect.16.5.1.1.2 Internal Network Mode

http://cache.nxp.com/files/soft_dev_tools/doc/support_info/iMX6DQPRM.pdf

Best regards

igor

[igorpadykov · Accepted solution]

Hi ZongbiaoLiao

one can use network mode, example is described in AN2628

Figure 10 Connecting to Two External Devices in SSI Network Mode

http://cache.freescale.com/files/32bit/doc/app_note/AN2628.pdf

Best regards

igor

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[宗標廖]

Hi igor

Thank you for your reply,it's helpful!

I have one more question as bellow.

I want to use AUDMUX external port as bellow(take port4 as example),is this implementation right?

Audio device1 uses Tx function of port4 and Audio device2 uses Rx function of port4. And I want device1 and device2 work simultaneously.

[igorpadykov]

Hi ZongbiaoLiao

yes it is right.

~igor

[宗標廖]

Hi igor

Please give me a reply!

[宗標廖]

Hi igor

Could you give me an answer?

Thank you very much!

[宗標廖]

Hi, igor

Thank you for your reply!

I am sorry for having some more questions!

Q1):

For the implementation as above, should SSI1 be master or slave?

And does the default BSP(L3.0.35_4.1.0) support this?

Q2):

According to AN2628, I think i.MX6 supports the following mode.

Does it need to connect a pull-up resistor on both AUD3_TXD and AUD4_TXD? And how to decide the resistance?

Thank you!