How many core has the ls1026a?

[marco3181]

Hi,

I have a question on the ls1026a. When I looked at ls1026a at the beginning of the year, it was a 2 cores processor. Now, it is a 4 cores processor.

We have received a ls1026a processor that was put in place of a ls1046a. The ls1046a is a 4 cores. The card was configured for a 4 cores ls1046a in u-boot and linux 4.13.5.

When we started with the new ls1026a, the 4 cores was started in Linux with no problems. We asked our seller what is the difference between the ls1026a and the ls1046a and he said that there are no differences (except speed).

And when asked again, he said that only 2 cores on the ls1026a were tested.

What NXP says? I am confused with all these contradictory informations.

If someone has more information, I am all ears.

Thank you

Marc

[r8070z · Accepted solution]

Have a great day,

The LS1046A has four cores and LS1026A has two cores. Pay attention to pin TEST_SEL_B (F20). This pin must be pulled to OVDD through a 100-Ω to 1kΩ resistor for a four core LS1046A device and tied to ground for a two core LS1026A device. If the LS1026A was put in place of a ls1046a the system can see it as the LS1046, but it is wrong. Your system cannot operate reliably in this case.

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[marco3181]

Thank you for your answer.

So the ls1046a/ls1026a NXP page is an error? (QorIQ® Layerscape 1046A|NXP  => "The QorIQ^® LS1046A and LS1026A processors integrate quad 64-bit Arm^® Cortex A72 cores with packet processing acceleration and high speed peripherals.")

[jeffsteinheider]

The language on the LS1046A/LS1026A page should be corrected to be more precise.

The QorIQ LS1046A and LS1026A processors integrate quad or dual 64-bit arm Cortex A72 cores...