iMX6UL 24 MHz crystal oscillator

[fuse]

Hello,

I've developed our custom board based on iMX6UL and I've a question about workaround suggest in Chip errata, ERR009455:

what happen if the pin XTAL IN is left floating (point 1) ) without connecting a 18pF load? Does the iMX6UL boot up correctly?

Reading the IMX6ULHDG document, it seems that a capacitor in the XTALIN pin is needed only for filtering.

Thanks in advance

Riccardo

[art]

A 18pF capacitor on the XTALI pin is required for proper AC biasing of the i.MX6UL internal circuit and providing a stable 24MHz clock source for PLL. So, please exactly follow the ERR009455 workaround.

Have a great day,
Artur

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[fuse]

Hi Artur,

I agre that I should follow the ERR009455 workaround but, due to a mistake, I have the XTALIN pin left floating, with a Crystal clock oscillator (with partitor 1k series / 499 Ohm ground) into pin XTAL OUT.

The real question is: in this situation does the iMX6UL works properly?

From first tests we're able to connect with JTAG and also through USB device (HID iterface recognized by windows) but I don't know if there will be other problems (i.e. with DDR memory or something else).

Thanks in advance

Riccardo

[art]

If the i.MX6UL device has already started operating somehow, there should be no further problems.

Best Regards,

Artur

[fuse]

Thanks Arthur

Best Regards

Riccardo