WIZnet Developer Forum

W6100 read/write MAC

Hello!

When on startup I try to write MAC address I use the following SPI command:

41 20 04 01 02 03 04 05 06

And I get response:
01 02 03 00 00 00 00 00 00

But then I try to read it with:
41 20 00 00 00 00 00 00 00
And get the reply:
01 02 03 00 00 00 00 00 00

My SPI comms work as I get 01 02 03 at the start. But why the register is empty?

Hello

There’s no address inside the chip.
You have to buy it separately and add address.

Thank you

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