Content originally posted in LPCWare by embd02161991 on Wed Mar 19 12:54:34 MST 2014
Hi,
Each of the GPIOs are multiplexed with different functions . So if some of the pins are left unused , you can use them for other functions as per the user manual.
Hence, if the pins P4.20 to P4.23 are not used for EMC addresses EMC_A[20] to EMC_A[23], they can be used for other functions.
Thanks,
NXP Technical Support