Using ESAI_TX_HF_CLK as MCLK

[JHY]

1. There is no doubts, BCLK and LRCLK.

ESAI_TX_CLK    ->    BCLK

ESAI_TX_FS     ->    LRCLK

But MCLK is not sure.

Am I able to use ESAI_TX_HF_CLK as MCLK?

ESAI_TX_HF_CLK ->    MCLK

2. ESAI_CLK_ROOT has max 66MHz frequency.

Is it applicalble to ESAI_TX_HF_CLK or not only ESAI_TX_CLK?

When ESAI_TX_HF_CLK is set output, what is max frequency?

[igorpadykov · Accepted solution]

HI JHY

1. as states sect.25.2.11 High Frequency Clock for Transmitter IMX6DQRM :

When programmed as output it can serve as a high frequency sample clock (to external DACs

for example) or as an additional system clock

2. according to Table 53. Enhanced Serial Audio Interface (ESAI) Timing IMX6DQCEC

ESAI_RX_HF_CLK/ESAI_TX_HF_CLK clock cycle = 15ns (min.)

Best regards

igor

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