AN 294: Crosspoint Switch Matrices in Altera MAX Series

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ID 683806
Date 9/22/2014
Public
Document Table of Contents
Document Table of Contents x
1. Crosspoint Switch Matrices in Altera MAX Series
1. Crosspoint Switch Matrices in Altera MAX Series x
1.1. Crosspoint Switches Using Supported Altera Devices 1.2. Implementation 1.3. Document Revision History
1.1. Crosspoint Switches Using Supported Altera Devices x
1.1.1. 16 × 16 Crosspoint Switch 1.1.2. Customized Crosspoint Switch
1.1.1. 16 × 16 Crosspoint Switch x
1.1.1.1. 16 × 16 Crosspoint Switch Architecture 1.1.1.2. Signals 1.1.1.3. Switch Matrix 1.1.1.4. Address Decoder 1.1.1.5. Configuration 1.1.1.6. Crosspoint Switch Expansion
1.1.1.6. Crosspoint Switch Expansion x
1.1.1.6.1. Source Code Modification 1.1.1.6.2. Multiple Device Implementation
1.1.2. Customized Crosspoint Switch x
1.1.2.1. Customized Crosspoint Switch Architecture 1.1.2.2. Configuration
1.2. Implementation x
1.2.1. Design Example: 16 × 16 Crosspoint Switch 1.2.2. Design Example: Customized Crosspoint Switch
1.2.1. Design Example: 16 × 16 Crosspoint Switch x
1.2.1.1. Reference Design Files Hierarchy 1.2.1.2. Reference Design Files 1.2.1.3. Design Utilization 1.2.1.4. Crosspoint Switch Expansion 1.2.1.5. Design Verification
1.2.2. Design Example: Customized Crosspoint Switch x
1.2.2.1. Cutomized Crosspoint Switch Configuration 1.2.2.2. Design Utilization 1.2.2.3. Design Verification
1. Crosspoint Switch Matrices in Altera MAX Series

1.1.1.6.2. 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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