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PCI IO illegal addressing...again
Hi,
My question is regarding IO address accessing:
It is illegal for the initiator to assert any byte enables of lesser
significance than the one indicated by AD[1:0].
I want to know what haapens if I asserts bytes that are of higher significance.
What happens if AD[31:0] is 0x00001000 and CBE#[3:0] is
0x3 - meaning I want to access only the third byte? Is this legal or do I must access at least from byte zero? Do I get a target abort?
The same question when AD[31:0] is 0x00001002 and CBE#[3:0] is 0x7? Is
this legal or do I must access from byte 2 and up? Do I get a target abort?
Thanks,
Raan