Every port has got the capability of generating an interrupt for each pin. So it is only an exception for some PSoC devices when a port has less than 8 I/O-pins.
thank you reply！
I see the documents in the chip manual of cy8c20XX6a.
To IO_CFG1 Register:
Bit 0: IO INT. This bit sets the GPIO Interrupt mode for all pins in the CY8C20x66 PSoC devices. GPIO interrupts are
controlled at each pin by the PRTxIE registers, and also by the global GPIO bit in the INT_MSK0 register.
i want to know whether IO INT is only seted in the CY8C20x66 PSoC devices . Other PSoC devices cannot use!
As I said in my last post:"Every port has got the capability of generating an interrupt for each pin"