mem_interfacing_spru949c

mem_interfacing_spru949c - TMS320x2833x, 2823x DSC External...

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Unformatted text preview: TMS320x2833x, 2823x DSC External Interface (XINTF) Reference Guide Literature Number: SPRU949C September 2007Revised May 2009 2 SPRU949CSeptember 2007Revised May 2009 Submit Documentation Feedback Contents Preface ........................................................................................................................................ 5 1 Functional Description .......................................................................................................... 7 1.1 Differences from the TMS320x281x XINTF ........................................................................... 7 1.2 Differences from the TMS320x2834x XINTF .......................................................................... 8 1.3 Accessing XINTF Zones ................................................................................................. 8 1.4 Write-Followed-by-Read Pipeline Protection .......................................................................... 9 2 XINTF Configuration Overview ............................................................................................. 10 2.1 Procedure to Change the XINTF Configuration and Timing Registers ........................................... 10 2.2 XINTF Clocking .......................................................................................................... 12 2.3 Write Buffer ............................................................................................................... 12 2.4 XINTF Access Lead/Active/Trail Wait-State Timing Per Zone ..................................................... 12 2.5 XREADY Sampling For Each Zone ................................................................................... 13 2.6 Bank Switching ........................................................................................................... 13 2.7 Zone Data Bus Width ................................................................................................... 14 3 External DMA Support (XHOLD, XHOLDA) ............................................................................. 16 4 Configuring Lead, Active, and Trail Wait States ..................................................................... 17 4.1 USEREADY = 0 .......................................................................................................... 17 4.2 Synchronous Mode (USEREADY = 1, READYMODE = 0) ........................................................ 18 4.3 Asynchronous Mode (USEREADY = 1, READYMODE = 1) ....................................................... 18 5 Configuring XBANK Cycles ................................................................................................. 22 6 XINTF Registers ................................................................................................................. 23 6.1 XINTF Timing Registers ................................................................................................ 23 6.2 XINTF Configuration Register...
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mem_interfacing_spru949c - TMS320x2833x, 2823x DSC External...

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