Single channel ABS SB0401 Monitoring Module Issue

[dhanabharathi]

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

1. 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).

2. 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.

3. 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?

[dhanabharathi]

Hi @guoweisun 

   yeah ok.

    Company:  Ettiksoft technologies Pvt ltd.

    project:  Two-wheeler single channel ABS. 

[guoweisun]

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

[dhanabharathi]

hello @guoweisun 

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

[guoweisun]

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

Home

[guoweisun]

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

[guoweisun]

Hi

Is possible to show your company and project information here?