SensorsのトピックRe: How to Send IBI from P3T1755 Temperature Sensor

How to Send IBI from P3T1755 Temperature Sensor

AbhiAk47 — Tue, 03 Feb 2026 21:27:56 GMT

How to configure P3T1755 Temperature Sensor to send IBI in I3C Mode ?

Re: How to Send IBI from P3T1755 Temperature Sensor

diazmarin09 — Fri, 26 Apr 2024 20:28:00 GMT

Hello AbhiAk47,

I hope all is great with you. Thank you for using the NXP communities.

As we know, the MIPI I3C Specification allows the I3C devices on the bus to generate an In-Band Interrupt (IBI) for the Active Controller to service using the SDA and SCL lines. This makes it possible for the devices on the bus to generate interrupts without using any external interrupt lines.

Please review chapter 7.4.5.10 from the datasheet and let me know if you have any questions.

I hope this information helps.

Regards,

David

Re: How to Send IBI from P3T1755 Temperature Sensor

AbhiAk47 — Wed, 01 May 2024 08:42:44 GMT

Hello David,

The datasheet has no information regarding how to configure this device to send IBI to I3C master.

Could you please help me with programming guideline to trigger IBI from Temperature Sensor ?

Warm Regards,

Abhishek

Re: How to Send IBI from P3T1755 Temperature Sensor

diazmarin09 — Fri, 03 May 2024 22:39:56 GMT

Hello AbhiAk47,

Please review the response from our specialist below:

Please ask customer to set T_LOW register over room temperature or T_HIGH register under room temperature in I3C mode, then P3T1755 will generate IBI event to I3C controller.

diazmarin09_0-1714775976731.png

Regards,

David

Re: How to Send IBI from P3T1755 Temperature Sensor

AbhiAk47 — Wed, 08 May 2024 16:31:33 GMT

Hello David,

Again the Datasheet has reading and writing guideline only for I2C (Section 7.6)

Could you please provide me programming steps for I3C regular transfer mode to send IBI ?

Also what values do I need to set for Configuration Register ? Do I need to set TM=1 to generate IBI ?

And In general, please provide I3C regular transfer mode programming steps to perform read and write operation to Temperature Sensor registers.

I tried writing to TLOW and THIGH register but didn't observe IBI. might be missing some step to write to these registers in I3C mode.