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Some questions of AXI

tony huang
Note: This was originally posted on 14th November 2011 at http://forums.arm.com

>>In AMBA4 AXI rev 2.0, in chapter 4.1 About addressing options:
>>Burst must not cross 4KB boundaries to prevent them from crossing boundaries between slaves and to limit the size of the address incrementer required within slaves.
Is it mean there use 20 bits to decode which slave is selected?

>>In chapter 9.2 Write strobes:
>>The write strobe signals, WSTRB, enable sparse data transfer on the write data bus.
I don't know what is this sentence mean. anybody can explanation detail, thanks!!
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