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AN4051 - FX2LP™ GPIF FLOW STATE FEATURE FOR UDMA | Cypress Semiconductor

AN4051 - FX2LP™ GPIF FLOW STATE FEATURE FOR UDMA

Last Updated: 
Oct 12, 2017
Version: 
*E

AN4051 introduces the FX2LPTM GPIF flow state feature, which extends GPIF to handle ATAPI UDMA. This application note includes flow state definitions and related register functions. It concludes with an example of how to use the flow state control in a UDMA transfer.

Introduction

Although the FX2LP™ GPIF flow state feature was created for UDMA, it is not limited to that interface. The GPIF flow state can capture other bus protocols, which gives it a value and lifetime that extends beyond UDMA. This is in keeping with the basic philosophy of GPIF.