1 Reply Latest reply on Dec 3, 2017 11:01 PM by sudh

    Behavior of CTL / FLAG pins in Port I/O Mode?

    nigel.keam

      Hi all,

         

      I'm using a CY7C68013a hi-speed USB interface chip.

         

      According to the docs there are thee modes: Slave FIFO, GPIF Master, and Ports I/O

         

      In Slave FIFO mode, the CTL/FLAG pins operate as FLAGA...FLAGC

         

      In GPIF Mode, the pins operate as CTL0...CTL2 and are controlled by GPIFIDLECTL ( except when doing a transaction )

         

      ... My question is what these three pins do when in Ports I/O mode? - are they tri-state or under control of GPIFIDLECTL,... ?

         

      Also - do writes to GPIFIDLECTL have immediate effect (on these pins)when in GPIF idle mode or is that sampled when entering idle mode?

         

      - Thanks!