S32K3 Number of SWT instances.

[li3]

Hi NXP,

Why is it found in Section 67 that S32K328, 338, 348, 358 support 3 SWT instances? We do see in section 2.5 that 2, 3, 1, and 2 SWT instances are supported respectively.

Best regards,

Li 3.

[petervlna]

Hello,

SWT chapeter description does not look correct to me.

You have one SWT for one active core (not for lockstepped), so you can refer to this simple rule.

Table 5. is correct.

Best regards,

Peter

[li3]

Hi HXP,

Is CM7_0-CM7_1 a kernel? Does Disable mean an unwanted kernel?

Best regards,

Li 3.

[petervlna]

Hello,

Disabled in this case means N/A. There is no point to have that column in the manual as those cores are not available.

Best regards,

Peter

[li3]

Hi HXP,

Is CM7_0-CM7_1 a kernel?

What is Lockstep and Decoupled?

Best regards,

Li 3.

[petervlna]

Hello,

From general uC theory:

Dual-redundant core (lock-step) CPU functionality

One of the most common techniques for implementing replication in automotive MCUs is called 'lockstep'. Lockstep means that two processors are running the same set of operations in parallel. The two sets of results are compared by a checker unit or comparator to look for single point faults.

Decoupled

Independent operation on each core.

Best regards,

Peter