i.MX6 HDMI CEC line treatment

[torus1000]

Hi,

Now I worry about leak current to the i.MX6 and interference to the CEC signal.

In my circuit, HDMI CEC line has pullup and keeps high when i.MX6 power shut down.

In such case do I need to take special care about this line?
     (e.g insert resister)

Thanks.

[igorpadykov · Accepted solution]

Hi torus1000

yes, special care should be provided, as according to

IMX6DQCEC sect.4.2.1 Power-Up Sequence

Ensure that there is no back voltage (leakage) from any supply on the board

towards the 3.3 V supply (for example, from the external components that

use both the 1.8 V and 3.3 V supplies).

NOTE

USB_OTG_VBUS and USB_H1_VBUS are not part of the power supply

sequence and can be powered at any time.

Best regards

igor

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