PHY Address & Netboot

Michael Wurm <[email protected]>
Newsgroups gmane.comp.hardware.microcontrollers.tini
Organization Technical University Graz
Message-ID <opr1n5bcx8bq9re5@localhost>
Hi,

I'm designing a board using DS80C400 with an alternative
Ethernet-PHY.
I have to hardwire the PHY's address, but when I set it to 00000,
the PHY enters isolate-mode automatically after reset.

Will the NetBoot also work with a PHY at a different address or
clear the isolate-bit?

thanks,
Michael


 From the Datasheet:
--------------------
PHY Address [4:0]:
The values of the PAD[4:0] pins are latched to this register at
power-up/reset. The first PHY address bit transmitted or
received is the MSB of the address (bit 4). A station
management entity connected to multiple PHY entities must
know the appropriate address of each PHY. A PHY address of
<00000> that is latched in to the part at power-up/reset will
cause the Isolate bit of the PR0 (bit 10, register address 00h)
to be set.
After power up/reset the only way to enable or disable isolate
mode is to set or clear the Isolate bit (bit 10) PR0. After power
up/reset writing <00000> to bits [4:0] of this register will not
cause the part to enter isolate mode.
--------------------

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