problem with HSMC

Thank you very much your advise.

I connected output pin using HSMC_TX_p4 and HSMC_TX_n4.

I use input data port for HSMC_D*. My program works.

But I connected output pin using HSMC_TX_p4 and HSMC_TX_n4.

And also I connected input pin assignment (LVTTL,3.3V standard) for

HSMC_RX_n4 and HSMC_RX_P4.

My program does not work.

We set port section as follows.

rx_in : IN STD_LOGIC_VECTOR (0 DOWNTO 0);

rx_out : OUT STD_LOGIC_VECTOR (0 DOWNTO 0);

tx_in : IN STD_LOGIC_VECTOR (0 DOWNTO 0);

tx_out : OUT STD_LOGIC_VECTOR (0 DOWNTO 0);

I am appreciate, if you suggest further configuration.