说明：  (1) This pin may function as either a JTAG port or a user I/O pin. If the device is configured to use the JTAG ports for in-system programming, this pin is not available as a user I/O pin. (2) The user I/O pin count includes dedicated input pins and all I/O pins.
((1) This pin may function as either a JTAG po rt or a user I/O pin. If the device is configured t o use the JTAG ports for in-system programming. this pin is not available as a user I/O pin. (2) Th e user I/O pin count includes dedicated input pi ns and all I/O pins.)