[En-Nut-Discussion] some questions

[Austin Schutz]

On Fri, Nov 08, 2002 at 09:53:07AM +0100, Harald Kipp wrote:
> 
> >
> >I have some questions.
> >
> >1) In RTL8019, if mega103 access 0x8300(memory map),
> >    can it believe "  I am accessing RTL8019 " without RTL8019 chip ID?
> >
> >   is it possible?
> >
> >   I think that if mega103 can access 0x8300, RTL8019 chip ID is not 
> > necessary.
> 
> I'm sorry, but I do not understand this question.
> Can you please explain in other words?

	I might be wrong, but I think the question is "can you know the
device at 0x8300 is the rtl8019 without checking the rtl8019 id?", the
answer being "yes".
	I think the 8019 id serves two purposes:
	
	1. While testing a hardware design, is the device at a certain
address an 8019?
	2. Is the 8019 working?

	If you know the Ethernut works there is no reason to check the 8019
id, because it wouldn't work if there wasn't an 8019 at 0x8300. Having
said that, why not check the id? If the hardware suddenly breaks it may save
you many hours of debugging to know the hardware is bad.

	Austin