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AM3352: AM3352 port configuration

na na78
Guru 16770 points
Part Number: AM3352


Hi

Could it be possible to change port configuration after AM3352 powered up?

For examle, it assumes that M16, L15, L16 and L17 ofAM3352 is configured as GPIO when powering up.
After GPIO operation, we want to make these port change to RGMII_RXD port.

1.
Could it be possible to change the port configuartion during operation dynamically?

2.
If it is possible, could you please tell us recommended software flow? EMAC init required?

BestRegards

  • 0
    TI__Guru**** 393215 points
    Hi,

    It's highly undesirable to change pinmux configuration on the fly, and TI does not recommend doing this. The reason is that there is a gap of several nanoseconds during the change, in which time the pin is in an undefined state. This could lead to signal transitions on the pin, that may cause unpredictable behavior either from external devices or from the processor itself.