Placing the ISD-300A's ATA Interface Pins in a High-Z State.

Question: Is there a way to place the ISD-300A1's ATA interface pins in a high-Z state?

 

Answer:

ATA_EN (pin 22 - active high) is used to control the ATA interface pins and to stop the internal ATA state machine. When ATA_EN is negated, the ATA interface pins are tri-stated and the internal ATA state machine is halted.

Please note that the  ISD-300A1 is obsolete and the functional replacement is AT2LP.  All the related collaterals of AT2LP can be found in the link here