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ARM Community: NEXT TO BUSY HWDATA OR HRDATA SHOULD BE REFLECTED...? - ARM Community

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NEXT TO BUSY HWDATA OR HRDATA SHOULD BE REFLECTED...? Rate Topic: -----

#1 User is offline   shahsanket24 

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Posted 26 June 2012 - 09:30 AM

hello...
In AMBA AHB is it necessary to extend HWDATA or HRDATA next to busy i.e. in seq after busy HWDATA or HRDATA should be same as that of busy...?

This post has been edited by shahsanket24: 26 June 2012 - 09:31 AM

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#2 User is offline   sim 

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Posted 26 June 2012 - 12:35 PM

HRDATA need only be valid for the HCLK on which HREADY is HIGH following the associated SEQ/NSEQ HTRANS+HREADY.
HWDATA need only be valid for every HCLK after the associated SEQ/NSEQ HTRANS+HREADY up to and including the one in which HREADY is HIGH.

hth
s.
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#3 User is offline   shahsanket24 

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Posted 26 June 2012 - 01:46 PM

That means slave need to sample hwdata or drive hrdata when htrans is busy and master needs to drive valid address when htrans is seq is it....?
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