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Altera_Forum's avatar
Altera_Forum
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16 years ago

I have some questions!

Hi,I am now useing the triple-speed ethernet Megacore,I have a questions about the control interface,the IP core have 8-bit address,but the mac interface register Map have 12-bit address offset,so ho...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

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the mac interface register Map have 12-bit address offset

--- Quote End ---

They are actually spanning a 10-bit range.

The IP handbook clarifies:

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8-bit address signal, which provides access to 256 32-bit registers

--- Quote End ---

Obviously the address map shows byte addresses, all addresses are multiples of four. So byte address[1..0] are implicitely zero.