Using LVDS as GPIO

You can use LVDS as GPIO by simply creating a GPIO block and assigning an LVDS resource to it. When you use LVDS resources as GPIO, some features are unavailable, depending on the FPGA as described in Table 2.

Assign a resource for the signal using the Resource Assigner.

Important: When LVDS resources are used for both LVDS and GPIO within the same bank, they must be separated by 2 unused pairs of LVDS pins to avoid any unwanted interference. The Efinity software issues an error if you do not leave this separation. Refer to Table 1.

Table 1. LVDS Resources Assignment Example with LVDS and GPIO Signals in Same Bank
Bank Number	Pin Names	Assigned Signals
BANK4A	GPIOB_RXN06	LVDS
BANK4A	GPIOB_RXP06	LVDS
BANK4A	GPIOB_RXN07	X
BANK4A	GPIOB_RXP07	X
BANK4A	GPIOB_RXN08	X
BANK4A	GPIOB_RXP08	X
BANK4A	GPIOB_RXN09	GPIO
BANK4A	GPIOB_RXP09	GPIO
BANK4A	GPIOB_RXN10	X
BANK4A	GPIOB_RXP10	X
BANK4A	GPIOB_RXN12_EXTFB0	LVDS
BANK4A	GPIOB_RXP12_EXTFB0	LVDS
BANK4B	GPIOB_TXN00	X
BANK4B	GPIOB_TXP00	X
BANK4B	GPIOB_TXN01	X
BANK4B	GPIOB_TXP01	X
BANK4B	GPIOB_TXN02	GPIO
BANK4B	GPIOB_TXP02	GPIO
BANK4B	GPIOB_TXN03	X
BANK4B	GPIOB_TXP03	X
BANK4B	GPIOB_TXN05	LVDS
BANK4B	GPIOB_TXP05	LVDS