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AM2612-Q1: AM261 Tsense demo issues

Kita Li
Expert 3555 points

Part Number: AM2612-Q1

Hi experts,

 

Good day! I am asking for customer.

Now customer is using tsense demo for temperature management. They are facing following issues:
a.    Only tenses0 can sample a fixed value with 0x54, other 3 channels doesn’t have value. Could you tell the reason?
b.    TRM doesn’t mentioned the actual accurate position of this 4 tense position. Could you provide the actual accurate position?
c.    TRM description is too simple. Do we have more details that can share to them?

 

Best Regards

Kita

  • 0
    TI__Expert 3410 points

    Hi Kita,

    Please find my replies below

    Kita Li said:
    Only tenses0 can sample a fixed value with 0x54, other 3 channels doesn’t have value. Could you tell the reason?

    No, all 4 TSENSE can be used, but as mentioned in TRM, it is recommended to use TSENSE0 and TSENSE1 for more accurate junction temperature readings. I am not sure what 0x54 you are referring to. Please use the below SDK example if needed for TSENSE configuration reference.

    https://software-dl.ti.com/mcu-plus-sdk/esd/AM261X/10_02_00_15/exports/docs/api_guide_am261x/SDL_VTM_PAGE.html

    Kita Li said:
    b.    TRM doesn’t mentioned the actual accurate position of this 4 tense position. Could you provide the actual accurate position?

    The TSENSE0 and TSENSE1 are located near critical hotspots in the device die, which will provide the max Junction temperature readings, which would be sufficient to get the Junction temperature readings. Apologies, I am not sure if we will be able to provide the TSENSE exact positions on the die.

    Kita Li said:

    c.    TRM description is too simple. Do we have more details that can share to them?

    The AM261 TRM from Sections 6.2.2.2.2 Thermal Manager all the way to 6.2.2.2.2.8 ADC Values Versus Temperature, captures all the details needed to configure and operate these TSENSE sensors. Please do let us know specifically what details you are looking for.

    Thanks,
    Tejas Kulakarni

  • 0 in reply to Tejas Kulakarni
    TI__Guru* 78686 points

    Hi Kita,

    Tejas Kulakarni said:
    software-dl.ti.com/.../quote]

    I am suggesting you, do a small code modification in this example to get temperature from all the sensors.

    In the below highlighted line, we selected only TS0 for selection even though we are trying to get temperature from all the sensors.

    So, i am suggesting you, replace above highlighted line with below line in the code to get temperatures from all the sensors.

    Here are the temperatures before this modification:

    Here are the temperatures after modification:

    --
    Thanks & regards,
    Jagadish.