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DRA829V: Is it possible to use both CPSW9G's SGMII2 (QSGMII) and RMII2 simultaneously?

Hideaki Matsumoto
Genius 9130 points
Part Number: DRA829V
Other Parts Discussed in Thread: SYSCONFIG

Hi,

Please tell us more about J721E_registers1.pdf p671, CTRLMMR_ENET2_CTRL Register. The SGMII2 (QSGMII) and RMII2 in CPSW9G seem to use different pins when using TI SysConfig_1.15.0. As such, our understanding is that both can be used together. However, in CTRLMMR_ENET2_CTRL Register.PORT_MODE_SEL, it seems only one can be used.

Is it possible to use both CPSW9G's SGMII2 (QSGMII) and RMII2 simultaneously? If yes, which are the relevant register to modify?

Regards,
Hideaki

  • 0
    TI__Guru 64780 points

    Hi,

    Hideaki Matsumoto said:
    The SGMII2 (QSGMII) and RMII2 in CPSW9G seem to use different pins when using TI SysConfig_1.15.0.

    Yes. RMII Pins were directly from CPSW PORTs, where as SGMII (Serial) pins from SerDes. Internally MAC port is mapped to Serdes based on SerDes pin functionality.

    Hideaki Matsumoto said:
    However, in CTRLMMR_ENET2_CTRL Register.PORT_MODE_SEL, it seems only one can be used.

    Yes, Only one mode can be used per port i.e. either SGMII or RGMII/RMII.

    Hideaki Matsumoto said:
    Is it possible to use both CPSW9G's SGMII2 (QSGMII) and RMII2 simultaneously? If yes, which are the relevant register to modify?

    No, It's not possible to use both SGMII and RGMII/RMII at same time.
    MAC port can operate in only mode at time.

    Best Regards,
    Sudheer