Other NXP ProductsのトピックRe: Single channel ABS SB0401 Monitoring Module Issue

Single channel ABS SB0401 Monitoring Module Issue

dhanabharathi — Thu, 01 Jan 2026 08:12:10 GMT

Hello @nxp ,

I’m using the SB0401 Single-Channel ABS module IC with an NXP S32K31xEVB-Q48 MCU as the SPI master. I transmit the monitoring/module data once every 10 ms, but the SB0401 monitoring module appears to reset/restart repeatedly (about once every 50 ms). Along with this, my SPI “error count” increases on every SPI transfer.

Below are the setup and my specific questions.

HW/SW setup

MCU (SPI Master): S32K31xEVB-Q48 (S32K31x family)
Device: SB0401 (Single-Channel ABS module IC)
Interface: SPI (LPSPI) (DMA based transfers)
Periodic transmission: every 10 ms
Observed issue: SB0401 monitoring module reset/restart every ~50 ms (see attached logs)

Observed behavior

The error counter increments for every SPI byte/word transfer.
I read AR (seed) from SB0401 message 18 and calculate MR based on that AR.
Despite sending frames periodically, the SB0401 monitoring module resets/restarts.

Questions

MR calculation vs AR (Message 18)
- My error count increases on every SPI transfer.
- I calculate MR using the AR value received from SB0401 message 18.
- Is it expected that an error counter would increment on every transfer in this condition, or does it indicate MR/AR logic is incorrect?
- Please confirm the correct MR computation flow/timing relative to AR (message 18) and any common pitfalls (e.g., using stale AR, wrong byte/bit extraction, timing window, counter alignment).
ACK position when writing Message 0
- If I write data into Message 0 at TxBuf[0], where should I check the acknowledgement?
- Example: For a write in TxBuf[0], does the ACK appear in RxBuf[0] (same word) or in RxBuf[1] (next word)?
- If there is a defined “ACK occurs in the following SPI word/frame” rule, please share the exact mapping.
Reference SW / CDD driver
- Is there any reference CDD / example driver for SB0401 (C source or AUTOSAR-style CDD integration) that can be shared for guidance?
- If not shareable, can you recommend the official SB0401 software package / app note / reference implementation details to follow?

Re: Single channel ABS SB0401 Monitoring Module Issue

guoweisun — Tue, 06 Jan 2026 02:06:47 GMT

Is possible to show your company and project information here?

Re: Single channel ABS SB0401 Monitoring Module Issue

dhanabharathi — Tue, 06 Jan 2026 04:51:19 GMT

Hi @guoweisun

yeah ok.

Company: Ettiksoft technologies Pvt ltd.

project: Two-wheeler single channel ABS.

Re: Single channel ABS SB0401 Monitoring Module Issue

guoweisun — Wed, 07 Jan 2026 05:07:09 GMT

This part doesn't have CDD or other software drive and the reference schematic also need customer sign NDA then share.

Re: Single channel ABS SB0401 Monitoring Module Issue

dhanabharathi — Wed, 07 Jan 2026 05:29:31 GMT

hello @guoweisun

ok. Any other reference code is there, like this module behaviour.

Re: Single channel ABS SB0401 Monitoring Module Issue

guoweisun — Wed, 07 Jan 2026 05:31:37 GMT

Let me check again for the reference code about this special part.

Re: Single channel ABS SB0401 Monitoring Module Issue

guoweisun — Wed, 07 Jan 2026 05:39:36 GMT

For the example code I can't post here, could you please submit ticket from case port?

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