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Altera_Forum
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20 years ago

Pins missing in reference design?

I'm working on a design that is basically identical to the design used by the 1c20 reference card. I'm having problems with both the CF and the Ethernet. I guess my main problem is...
Altera_Forum's avatar
Altera_Forum
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20 years ago

The 91c111 can operate in many different modes; see SMSC's documentation for further detail. Only one mode (32-bit asynchronous, nADS = 0) is supported in our hardware example designs.

The other FPGA pins are un-used (tri-stated), and either left floating or pulled high/low via resistors on our dev board. The idea is to supply you with a board that can be reconfigured (by you) if you want to work with a different operating mode for that device.