schematic review: minimal XE216-512-TQ128 board

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mst
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schematic review: minimal XE216-512-TQ128 board

Postby mst » Wed Mar 13, 2019 9:57 pm

Hey,

for a project of mine (a USB audio interface), I have adapted the xCORE 200 eXplorer schematic as included in xCORE-200-explorerKIT-Hardware-Manual%281.2%29.pdf as best as I could.

Contrary to the eXplorer kit, my design is USB bus-powered, and contains a bunch fewer components. I will be using the XEF216 variant of the chip with built-in flash, so there is no external flash in my design.

As this is my first XMOS design, I would appreciate it a lot if someone could review my attached schematic and point out any issues.

Thank you very much in advance,
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mon2
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Postby mon2 » Thu Mar 14, 2019 2:04 pm

Hi. See section 8 of the datasheet for the XEF216 for the following details:
internal_flash_boot_resistor.png
Missing 1k PU on X0D01 to force the boot from the internal flash inside the XEF216 CPU.
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bear118
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Postby bear118 » Fri Mar 15, 2019 3:07 am

mon2 wrote:Hi. See section 8 of the datasheet for the XEF216 for the following details:

internal_flash_boot_resistor.png

Missing 1k PU on X0D01 to force the boot from the internal flash inside the XEF216 CPU.
Yes, otherwise you can't boot from internal flash.
mst
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Postby mst » Fri Mar 15, 2019 8:47 am

Thanks for pointing this out! This is now fixed.

The rest is okay, I assume? :)

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