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Question on MIIM of Ethernet MAC Controller
by a_roald on Sep 14, 2004 |
a_roald
Posts: 2 Joined: Sep 18, 2008 Last seen: Dec 6, 2008 |
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I'm a newbie. So I select Ethernet MAC Controller project as my first
studying project.
While I am reading the MIIM of the controller, I am confused by
eth_outputcontrol.v.
In this file, MdoEn_2d, MdoEn_d, MdoEn are used. While MdoEn is
replaced by MdoEn_2d, it will cost 3 MDC cycle. ShiftBit will be sent on
Mdc rising edge. Is MdoEn delayed by 2 MDC cycle? I'm confused. Could
you help me?
Thanks
Haojian Zhuang
a_roald at hotmail.com
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Question on MIIM of Ethernet MAC Controller
by Unknown on Sep 15, 2004 |
Not available! | ||
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Hi, Haojian.
Why don't you take something simpler for a start? MdoEn is delayed 2 cycles because it works with the combination with Mdo (that can be changed twice). Look at the Mdo and you should understand. Regards, Igor
I'm a newbie. So I select Ethernet MAC Controller project as my first
studying project.
While I am reading the MIIM of the controller, I am confused by
eth_outputcontrol.v.
In this file, MdoEn_2d, MdoEn_d, MdoEn are used. While MdoEn is
replaced by MdoEn_2d, it will cost 3 MDC cycle. ShiftBit will be sent on
Mdc rising edge. Is MdoEn delayed by 2 MDC cycle? I'm confused. Could
you help me?
Thanks
Haojian Zhuang
a_roald at hotmail.com
_______________________________________________
http://www.opencores.org/mailman/listinfo/cores
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Question on MIIM of Ethernet MAC Controller
by a_roald on Sep 16, 2004 |
a_roald
Posts: 2 Joined: Sep 18, 2008 Last seen: Dec 6, 2008 |
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While NoPre is 1, RStat is 1 and BitCounter is 0, SerialEn and ShiftBit is
enable.
When ShiftBit is assigned to Mdo, it is after two Mdc cycles. At that
time, BitCounter is 34.
While BitCounter is 48, MdoEn is disabled. But MdoEn only has 14 Mdc
cycle, it can't output the last two bit {1, 0}. So I was confused about
this.
Thanks
Haojian Zhuang
----- Original Message -----
From: Igor Mohorigorm at o...>
To:
Date: Wed Sep 15 11:28:21 CEST 2004
Subject: [oc] Question on MIIM of Ethernet MAC Controller
Hi, Haojian.
Why don't you take something simpler for a start? MdoEn is delayed 2 cycles because it works with the combination with Mdo (that can be changed twice). Look at the Mdo and you should understand. Regards, Igor
> I'm a newbie. So I select Ethernet MAC Controller project as
my first
> studying project.
> > While I am reading the MIIM of the controller, I am confused by
> eth_outputcontrol.v.
> > In this file, MdoEn_2d, MdoEn_d, MdoEn are used. While MdoEn is
> replaced by MdoEn_2d, it will cost 3 MDC cycle. ShiftBit will
be sent on
> Mdc rising edge. Is MdoEn delayed by 2 MDC cycle? I'm
confused. Could
> you help me?
> |
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