[En-Nut-Discussion] Meaning of the EEMU signal

[Tobias Schneider]

Hi,
thanks for the answer. I asked because we are designing a AVR-Ethernet Board 
( www.ispf.de ) and I want it to be as much ethernut compatible as possible.

Best regards

Tobias
----- Original Message ----- 
From: "Matthias" <en_nut_discussion at onlinehome.de>
To: "Ethernut User Chat" <en-nut-discussion at egnite.de>
Sent: Sunday, January 09, 2005 3:00 AM
Subject: Re: [En-Nut-Discussion] Meaning of the EEMU signal


> Hello Harald,
>
>>In fact EEMU(A15) is held high during EEPROM emulation,
>>which indeed disables the RAM. If your board works
>>without using this line, fine. :-) But
>
>>     NICOUTB(NIC_CR, NIC_CR_STP | NIC_CR_RD2 | NIC_CR_PS0 | NIC_CR_PS1);
>>     NICOUTB(NIC_PG3_EECR, NIC_EECR_EEM0);
>
>>accesses the RTL8019 and I wonder how this should
>>work if A15 is floating.
>
> Now I understand the meaning of th EEMU line, and I really wonder why it
> works at my board.
>
> I will investigate the A15 line in the next days using a scope.
>
>
> Best regards
>
> Matthias
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