AN5072 - ATA Bus Sharing with the EZ-USB® AT2LP™ | Cypress Semiconductor
AN5072 - ATA Bus Sharing with the EZ-USB® AT2LP™
The chips in the EZ-USB® AT2LP family (which includes part numbers CY7C68300C, CY7C68301C, CY7C68320C, and CY7C68321C), have built-in functionality that allows them to set their ATA interface pins in a high-impedance state so that another ATA master can control the bus. This allows the AT2LP to be used in any system with more than one controller connected to the ATA bus, such as a USB/1394 storage device or USB-enabled multi-media player.
The purpose of this application note is to give an overview of the features available in the AT2LP that allow for ATA bus sharing, and to give recommendations for properly implementing a shared bus design.