Using SAI2 root clock for SAI1

ovalentin — Fri, 13 Oct 2017 15:21:39 GMT

Hello,

I would need to have different sample rates for SAI1_RX and SAI1_TX, so I am trying to use SAI2 clock for one of them, as proposed in I2Sx_xCR2/MSEL.

Unfortunately, this leads to a silent clock and no transfer.

The documentation states (Ref Manual p4327) "Depending on the device, some Master Clock options might not be available. See the chip-specific information for the availability and chip-specific meaning of each option."

So my question is twofold:

- Is it legal to attempt to use SAI2 root clock for one of SAI1 streams ?

- Where may I find the "chip-specific information" for i.MX7D?

Best regards,

Olivier

Re: Using SAI2 root clock for SAI1

igorpadykov — Fri, 13 Oct 2017 23:08:52 GMT

Hi Olivier

MSEL can select only one clock, two options are not available,

may be useful link

MX7D how to obtain 2 different SAI MCLKs

Best regards
igor
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i.MX Processors中的主题 Using SAI2 root clock for SAI1

Using SAI2 root clock for SAI1

Re: Using SAI2 root clock for SAI1