AN 294: Crosspoint Switch Matrices in Altera MAX Series

Download PDF
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

1.1.2.2. Configuration

The process of switch configuration is exactly the same as a 16 × 16 crosspoint switch. You can add a register to LOAD REGISTERS and CONFIGURATION REGISTERS to store the tri-sate bit. This results in a total of three bits for a 4-port customized crosspoint switch: two bits for an input address and one bit for a tri-state. The two most significant bits (MSBs) in each register identify the input that connects to that output, and the least significant bit (LSB) controls whether the output is active or tri-state.

Reset mode for this customized design is different from the 16 × 16 crosspoint switch because all ports are bidirectional. When in reset mode, all the bidirectional ports are in an initialized state and all the ports are in tri-state mode.

Level Two Title