Wiz812mj and ATmega64

Network Module WIZ81xMJ
1

Hello
I want to connect wiz812mj to ATmega64 using MCU bus interface like it’s shown on the picture belowe taken from ATmega64 datasheet (you have to dowload it to see in normal size):

What should I do with /CS pin from Wiznet module? How should I connect it?
Best regards

2

Hi,

If ATMega64’s external bus can be only interaced with WIZ812MJ, WIZ812MJ’s /CS signal can be always ‘0’ (that is, tied with ground),
But ATMega64’s external bus can be shared with other devices, as well as WIZ812MJ, You shoud controll the /CS signal thru an extra glue logic as address decoder.

Thank you.