Where XMOS?

Technical discussions around xCORE processors (e.g. General Purpose (L/G), xCORE-USB, xCORE-Analog, xCORE-XA).
Gvsdavr
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Re: Where XMOS?

Postby Gvsdavr » Tue Dec 22, 2020 8:58 am

Big companies are out of stock? Or you should find more suppliers.
genap
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Postby genap » Fri Jan 29, 2021 9:50 pm

migueljds wrote:
Fri Dec 18, 2020 11:55 am
we had transition from 90nm flash memory (obsoleted by our supplier) to 65nm flash memory, thus the XUF208-256-TQ64-C10 is replaced with XUF208-256-TQ64-C10A part.
We will stock Digikey etc. with the new parts in due course in, probably in Q1.
This does not explain the stock situation with XU208 since it has no flash.
Actually I checked stock on XU/XUF parts - there is no stock on ANY of them.
We have a board prototype ordered with two XU208-256-TQ64 (or -128), and can't find them :(
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mon2
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Postby mon2 » Sat Jan 30, 2021 6:19 pm

Hi. Took a bit of digging and found the following inventory:

https://uk.farnell.com/xmos/xuf208-128- ... B-OCTOPART

They appear to have 84 pcs in stock as of this writing. This component has the INTERNAL FLASH (ISSI) which should work fine for your case. Grab a few while you can. Inventory I believe is in the UK but you can have them transfer it to any local branch.

The listing states this exact part #

XUF208-128-TQ64-C10

is no longer in production as it is being replaced with:

XUF208-128-TQ64-C10A

which Digikey is stating will be in stock near end of February.

(high memory version)

Digikey # 880-XUF208-256-TQ64-C10A-ND

Hope this helps.
genap
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Postby genap » Sun Jan 31, 2021 1:40 am

Thank you mon2,

Our prototype boards are designed with XU208, with direct update of the external memory by a microcontroller.
So it seems that we will hope for a stock at Digikey, in a meantime working on other board's components
and solder XMOS chips when they are available.

Thank you again .
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mon2
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Postby mon2 » Sun Jan 31, 2021 1:49 am

Hi. If I recall correctly, you can treat the internal flash memory as though it is external. So if you assert the #reset on the cpu, all of the flash interface lines will tristate (hi-z). Then you can perform your normal flash access with the internal flash device with your cpu.

Just note that internal flash is from issi so the ids will vary accordingly.

Please review the cpu datasheet but fairly sure you can do this.
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mon2
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Postby mon2 » Sun Jan 31, 2021 2:12 am

Yup. See section 8 of the xuf208 data sheet. You will see the internal view of the CPU. The same connections are most likely used by your design for the external flash.

So proceed to assert #reset ( make it Low ) and then apply your external microcontroller lines to access the internal QSPI flash device.
genap
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Postby genap » Sun Jan 31, 2021 5:10 am

Thank you.
You are right.
We considered this approach. I've decided to go with external memory because:
1. Microcontroller will operate in SPI mode, and XMOS chip in quad SPI. It was easier to operate external memory, also because we have two chips on a board.
2. It's easier for our contract manufacturing to preprogram external flash than XMOS chips.
AlexAdvice
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Postby AlexAdvice » Sun Mar 28, 2021 7:45 am

The end of Mart, Digikey have only one chip in 64-pin package, and it is not XU/XUF208.
NO ONE chip in 48-pin package. So our products with XS1 and 208 will finished soon.

We decide to start of redesigning out products with other platform, to go away from XMOS.
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mon2
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Postby mon2 » Sun Mar 28, 2021 6:32 pm

Hi. The semiconductor industry is currently a mess for assorted reasons. The inventory levels of ST micros is very similar. AKM devices that were $3-$5 USD each are selling @ $60++ USD on the street.

Suggest highly to contact the USA Sales head (regardless of where you may be located):

https://www.linkedin.com/in/nial-van-wa ... full-click

Reach out to him, even if needed to be through Linked In. Have limited contact details these days but he should be there to offer you the official status of the "A" die version of these devices. That was the original reason for the delayed production.
AlexAdvice
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Postby AlexAdvice » Sun Mar 28, 2021 10:16 pm

It was a fire at AKM's factory in October.

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