On the CY3267, there are 2 IOs (from PowerPSoC) brought out to header P4. These are P1  and P2 . Both connect to the Analog Mux Bus 1 and can be routed through this bus to the analog peripherals. If the Analog Mux Bus 1 and 0 are left unconnected, these pins can be routed to the blocks in Analog Column 1 alone. Connecting the 2 analog mux buses enables routing the pins to either column. These 2 pins are not capable of analog output.
The four FN pins brought out to header P4 are not capable of analog IO.