cpld实现IDE、ATA控制器.pdf

IDE/ATA Controller Using MAX II CPLDs December 2007, ver. 1.0 Application Note 495 Introduction Storage devices, such as the floppy drive, CD-ROM drive, and hard disk drive, are connected to the computer through the IDE/ATA interface. This design example illustrates the implementation of an IDE/ATA controller using a MAX® II CPLD through which a host computer or microprocessor system can connect to a standard Integrated Drive Electronics (IDE) device. IDE/ATA When controllers and hard drives had proprietary technologies, a controller from one manufacturer did not work well with a hard drive Controller and from another manufacturer. The IDE was created to standardize the use Interface of hard drives in computers. This was based on a concept of combining the controller and the hard drive, thereby reducing interface costs and making firmware implementations easier. The controller residing on a chip provided the means for transferring data to or from the host computer. This IDE controller, also known as the ATA (Advanced Technology Attachment) controller, is an asynchronous parallel interface between a host microprocessor system and a standard IDE device. Therefore, this can be called a host adapter because it provides a way to connect a complete IDE device to the host.