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Original question:

TPS23880: 802.3at Sifos testing

TPS23880: TPS23880EVM Sifos Testing

chentsu chung
Mastermind 6180 points
Part Number: TPS23880

Hi,

When I do Sifos testing with Reg 0x29 value 0x0F (4 pair 90W),

I got detection result from Reg 0x0C value 0x0B/0x0C/0x0D/0x0F , and these are not list in Table 12. of  datasheet.

Could you please tell us what the values stand for?

BTW, There is not the same situation when I test Sifos with Reg 0x29 value 0x03 (2 pair 30W).

Why we got these different results?

Thank you,

C.T.

  • 0
    TI__Genius 15685 points
    Hi C.T,

    Did you use Sifos AT test suite or BT? I don't think the Type 3 and Type 4 PSE (2 pair port and 4 pair port)will pass sifos AT test as sifos AT test suite doesn't support 4 pair port and all new timing spec in BT standard for Type 3 and Type 4. Thanks.

    Best regards,
    Penny