Dear Nikhil, As you stated the FSX pin remains high continously.This might be because there are two modes in the serial port interface circuit depending the TXM bit in the SPC(serial port control register ) through which you can configure FSX pin as input or output. If configured as input the state depends on the device generating this signal. Try resetting this TXM bit in the SPC register. For reference you can go through the manual spru131c.pdf (Referene Manual Vol1-CPU & Peripherals). With Regards |