topic Unexpected BSP changes when upgrading RTD in S32K

Unexpected BSP changes when upgrading RTD

durga_choudhury — Tue, 18 Aug 2026 17:47:01 GMT

MCU: S32K148 144 pin package

IDE: S32DS 3.6.6 on Windows 11

RTOS: Bare metal

Driver model: Non-MCAL

When I upgraded an existing project from RTD v 3.0.0 to QPL06, I got the following changes auto-inserted into the .mex file (among others, but the others seem mundane)

<enable_parallel_routing>true</enable_parallel_routing>

I am wondering what does the 'enable_parallel_routing' does?

And I am puzzled by the 'serdes' tag: does it stand for Serializer-Deserializer? The K148 chip does not have this capability. Why is this needed?

Re: Unexpected BSP changes when upgrading RTD

Julián_AragónM — Wed, 19 Aug 2026 16:42:23 GMT

Hello @durga_choudhury,

S32DS Config Tools share functionality between other families (such as S32Z, S32N, S32G, etc.). You can see that when selecting a S32K MCU, SERDES Serializer/Deserializer tool (along with DCD, IVT, QuadSPI, DDR, among others) are disabled, since it is not supported:

Julin_AragnM_0-1787152919605.png

Same reason for enable_parallel_routing configuration. You can enable/disable this from "Project > Properties > S32 Configuration Tools > Enable Parallel Routing", and it is shared between families using Pins tool.

Julin_AragnM_1-1787156448892.png

Even though I was not able to find within the documentation a description for this, when enabled, the Pins tool will prompt the user during signal routing if another signal shares the same physical pin and writes to the same PORT register with the same configuration values.

The tool will ask whether to automatically co-route all such signals simultaneously. I can reproduce this by configuring WKPU signal sharing configuration values with ADC in S32K3:

Julin_AragnM_2-1787157425075.png

If disabled, this prompt is not present.

Best regards,
Julián

Re: Unexpected BSP changes when upgrading RTD

durga_choudhury — Wed, 19 Aug 2026 17:14:22 GMT

Thank you very much for the update.