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Altera_Forum's avatar
Altera_Forum
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15 years ago

problems of initiate 10/100/1000mac wtih 1000 base -x/sgmii

hi,

hello everyone, now i'm debug a ethernet ip in stratixiigx kits, when i generate the ip core,i find the address ie 8 bit width,but it's user guide says the max address of mac control interface is 0x3FC,the 8 bit data can demonstrate the 0x3FC?why?

another problem is when i use 100M ethernet,my system clock is 100MHz,it gernate the clk,ff_tx_clk,ff_rx_clk,I think the clk is 100MHz,but how can i config the ff_tx_clk,ff_rx_clk?

expect someone help me,thankful

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    The address bus on an Avalon slave directly designates a register number. As the data bus is 32-bits wide, the address is shifted by two bits. Ie when you put 0x10 on the address bus, you are in fact accessing the register at address 0x40.

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    hi,i find you are more knowledgeable,you help to resolve many problems with ethernet ip core,thanks