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How Do I Allocate and Access Address Space on Internal Data Bus

Question asked by Jew-Dong Kuo on Oct 8, 2009
Latest reply on Oct 11, 2009 by Wolfgang Rostek

I need to allocate 1K address for controlling the 20 DAC devices through internal data bus.

 

I am confused by Chapter 5 System Configuration when it talks about Local Access Windows Target Interface (p. 5-1 to 5-3).  Each window maps to different target interface (e.g. IMMR, local bus, PCI, SDRAM, etc.)  Do I need to configure the access windows in order to access the interested address space (say 0xA0000000 in this case)?  Can I directly write my DAC control values directly to 0xA0000000?

 

Chapter 10 Local Bus Controller is even more confusing.  Seems to me that it mainly talks about memory, SDRAM, etc.   It does not talk much about setup for accessing peripheral devices.  What should I look into in Chapter 10?


Thanks!

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