AN 294: Crosspoint Switch Matrices in Altera MAX Series

ID 683806
Date 9/22/2014
Public Multiple Device Implementation

To implement multiple devices in hardware, you need an optional tri-state pin. This tri-state pin disables the output buffers so that you can maintain the number of outputs while the number of inputs is increased.

The switch matrix can be asymmetric when the number of inputs and outputs are different.

Figure 3. Input Port Expansion
Figure 4. Output Port Expansion

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