The macrocell only supports a 32-bit port size, and only supports the dynamic port mode.
In the ETMCR, at offset
0x0, from reset:
The PortSize bits, bits[21, 6:4], take the value
b0100, indicating a 32-bit port.
The PortMode bits, bits[13, 17:16], take the value
b000, indicating dynamic port mode.
For more information see Main Control Register.