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AM6421: AM6421 AND DP83822 IN CPSW

Narasimha Rao
Intellectual 615 points
Part Number: AM6421

We are using AM6421 and PHY driver DP83822  for CPSW mode in Linux.

Can we take the Interface as below

CPSW_RMII1_RD0   -   PRG1_PRU1_GPO7 (V15)

CPSW_RMII1_RD1  -    PRG1_PRU1_GPO9 (V14)

RGMII2_RX_CTL      -   PRG1_PRU1_GPO4 (W12)

CPSW_RMII1_TD0   -   PRG1_PRU1_GPO10 (W14)

CPSW_RMII1_TD1  -   PRG1_PRU1_GPO17(AA14)

  • 0
    TI__Mastermind 40080 points

    Hi,

    From Table 7-32 of the there is a note that says for for proper operation, all pin multiplexed signal assignments must use the same IOSET. 

    The pin you listed (RGMII2_RX_CTL      -   PRG1_PRU1_GPO4 (W12)) is not in the same IO set for RMII1 which the signals are. 

    So the answer here is that you cannot take interface as you have listed.  Table 7-32 shows the iosets for the CPSW when configed for RMII mode.

    Best Regards,

    Schuyler