-- NC : No Connect. This pin has no internal connection to the device.
-- DNU : Do Not Use. This pin MUST NOT be connected.
-- VCCPGM : Dedicated power pin for configuration, which MUST be connected to 1.8V, 2.5V, 3.0V or 3.3V depending on the requirements of the configuration device.
-- VCCINT : Dedicated power pin, which MUST be connected to VCC (1.1V).
-- VCCIO : Dedicated power pin, which MUST be connected to VCC
-- of its bank.
-- Bank 3A: 3.3V
-- Bank 3B: 3.3V
-- Bank 4A: 3.3V
-- Bank 5A: 3.3V
-- Bank 5B: 3.3V
-- Bank 6B: 2.5V
-- Bank 6A: 2.5V
-- Bank 7A: 2.5V
-- Bank 7B: 2.5V
-- Bank 7C: 2.5V
-- Bank 7D: 2.5V
-- Bank 8A: 3.3V
-- RREF : External reference resistor for the quad, MUST be connected to
-- GND via a 2k Ohm resistor.
-- GND : Dedicated ground pin. Dedicated GND pins MUST be connected to GND.
-- It can also be used to report unused dedicated pins. The connection
-- on the board for unused dedicated pins depends on whether this will
-- be used in a future design. One example is device migration. When
-- using device migration, refer to the device pin-tables. If it is a
-- GND pin in the pin table or if it will not be used in a future design
-- for another purpose the it MUST be connected to GND. If it is an unused
-- dedicated pin, then it can be connected to a valid signal on the board
-- (low, high, or toggling) if that signal is required for a different
-- revision of the design.
-- GND+ : Unused input pin. It can also be used to report unused dual-purpose pins.
-- This pin should be connected to GND. It may also be connected to a
-- valid signal on the board (low, high, or toggling) if that signal
-- is required for a different revision of the design.
-- GND* : Unused I/O pin. Connect each pin marked GND* directly to GND
-- or leave it unconnected.
-- RESERVED : Unused I/O pin, which MUST be left unconnected.
-- RESERVED_INPUT : Pin is tri-stated and should be connected to the board.
-- RESERVED_INPUT_WITH_WEAK_PULLUP : Pin is tri-stated with internal weak pull-up resistor.
-- RESERVED_INPUT_WITH_BUS_HOLD : Pin is tri-stated with bus-hold circuitry.
-- RESERVED_OUTPUT_DRIVEN_HIGH : Pin is output driven high.
-- GXB_NC : Unused GXB Transmitter or dedicated clock output pin. This pin
