Return path from all states has this SLCS signal. State machine goes to IDLE state as soon as SLCS signal becomes high. But as you said you can use that GPIO for something else if you are short of GPIOs. You can control the state machine based on RD#, WR#, OE# and PKTEND signals.
Great - thanks a bunch!
No answer to the DSS_STATE question??
I am curious to know what the DSS_STATE is for as well.
Really what's the purpose of this DSS_STATE?