topic Re: TRGMUX Configuration Issue: LCU0_OUT0 Not Routed to eMIOS_0_CH_7_G in S32K

TRGMUX Configuration Issue: LCU0_OUT0 Not Routed to eMIOS_0_CH_7_G

GaneshBhagwat — Fri, 17 Apr 2026 14:06:09 GMT

Hi,

The LCU output is correctly observable on its direct physical pin. However, when routing this signal via TRGMUX to an eMIOS channel (and then to the corresponding eMIOS output pin), the signal does not appear on the eMIOS physical pin.

Currently, my LCU output is working correctly on LCU0_OUT0, which is mapped to pin [F17] PTD3. However, I would like to route the same output signal to another pin, specifically eMIOS_0_CH_7_G on [R3] PTE9.

I have configured TRGMUX for this purpose, but the signal is not appearing on the target pin. I referred to the following discussion, which seems to describe a similar setup (please confirm if this is the correct approach):
https://community.nxp.com/t5/S32K/Routing-signals-to-emios-from-trgmux-using-s32-Design-Studio/m-p/1832877?profile.language=en

I have also attached a ZIP file of my project for reference. Could you please review it and help identify why the routing is not functioning as expected?

Additionally, I noticed that routing works when using LCU outputs directly, but I encounter issues when trying other routing paths. Any insights on this would also be helpful.

Could you please help me resolve this issue?

Thanks and regards,
Ganesh Bhagwat

Re: TRGMUX Configuration Issue: LCU0_OUT0 Not Routed to eMIOS_0_CH_7_G

Robin_Shen — Mon, 20 Apr 2026 03:31:26 GMT

Hi Ganesh,

Below is the signal routing diagram that customer drew for me back then. Please confirm whether you also need to configure the signal direction as him.

Since I sent the modified example code directly to that customer, I forgot to upload a screenshot of the Trigger MUX configuration in my reply. The textual description in that reply might be confusing you, so I will post a screenshot of the modified Trigger MUX configuration for your understanding:

Please note that the eMIOS_0_CH_7_G signal is internally provided by TRGMUX_INT_OUT38 via the Input SSS selection of the IMCR567. See “S32K358_Input Muxing eMIOS_0_CH[7]_G SIUL_IMCR567 TRGMUX_INT_OUT38.png” shown below. eMIOS_0_CH_7_G is not selected to be input from a certain pin (PTE9\PTE7\PTB1).

Siul2_Port_Ip_SetInputBuffer(NULL, 0, FALSE, 567-512, PORT_INPUT_MUX_ALT4);//eMIOS0_CH7 IMCR567 to 0x4 (TRGMUX_INT_OUT38)

Best Regards,
Robin
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Re: TRGMUX Configuration Issue: LCU0_OUT0 Not Routed to eMIOS_0_CH_7_G

GaneshBhagwat — Mon, 20 Apr 2026 09:09:58 GMT

Hi @Robin_Shen

I tried the pin configuration you suggested, but it's still not working.

What is working:
- I can see the physical output on **LCU0_OUT0** (PTD pin) as expected.

What is not working:
- After routing LCU0_OUT0 through **TRGMUX** to **PTE9**, I cannot see any signal on PTE9 on the scope.
- I tested PTE9 configured both as input and as output, but still no signal appears.

My goal is to route the LCU0_OUT0 signal through TRGMUX to an eMIOS channel and then finally to a physical pin (PTE9).

I have not done any eMIOS configuration yet. Is eMIOS channel configuration required to properly route and output the signal from TRGMUX to the pin? Or should the TRGMUX routing work independently?

For my application, I need the LCU output to appear on PTE9 (or any eMIOS-connected pin).

I have attached the current pinout and TRGMUX settings for your reference.

Could you please help me understand what I might be missing?

Thank you for your support.

Ganesh Bhagwat