iCE40 UltraPlus 8:1 Mic Aggregation Demo
User Guide
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2 FPGA-UG-02035-1.2
Contents
1. Introduction ..................................................................................................................................................................3
1.1. Demo Design Overview .......................................................................................................................................3
2. Functional Description ..................................................................................................................................................4
3. Demo Package ..............................................................................................................................................................5
4. iCE40 UltraPlus MDP and Resources ............................................................................................................................6
4.1. Configuring the iCE40 UltraPlus MDP .................................................................................................................7
5. Programming the Bitstreams to the iCE40 UltraPlus MDP ...........................................................................................8
6. Running the Demo ......................................................................................................................................................10
6.1. Using Headphones ............................................................................................................................................10
6.2. Oscilloscope Connection Points ........................................................................................................................11
6.3. I2S Aggregation Signal Format ...........................................................................................................................12
6.4. Measured Oscilloscope I2S Aggregation Signals ................................................................................................13
Appendix A. Schematic Diagram.........................................................................................................................................14
Appendix B. Bill of Materials...............................................................................................................................................15
Technical Support Assistance .............................................................................................................................................16
Revision History ..................................................................................................................................................................16
Figures
Figure 1.1. 8:1 Mic Aggregation Demo Overview .................................................................................................................3
Figure 2.1. 8:1 Mic Aggregation Demo Block Diagram .........................................................................................................4
Figure 3.1. Directory Structure .............................................................................................................................................5
Figure 4.1. iCE40 UltraPlus MDP Configuration ....................................................................................................................6
Figure 4.2. iCE40 UltraPlus MDP and 8 to 1 Mic Aggregator Board......................................................................................7
Figure 5.1. Device Properties................................................................................................................................................8
Figure 5.2. Program Device Button.......................................................................................................................................9
Figure 6.1. Mode Push Button Control Sequences Selected Microphone..........................................................................10
Figure 6.2. 8 to 1 Mic Aggregator Board (Daughter Board) ................................................................................................10
Figure 6.3. J30 Section on MDP Board................................................................................................................................11
Figure 6.4. Header to Connect to the Oscilloscope ............................................................................................................11
Figure 6.5. Aggregation TDM Format for 8 Channels .........................................................................................................12
Figure 6.6. I2S Aggregation for Channel 1 ...........................................................................................................................12
Figure 6.7. I2S Aggregation for Channel 8 ...........................................................................................................................12
Figure 6.8. Measured I2S Aggregation Signals for 8 Channels ............................................................................................13
Figure 6.9. Measured I2S Aggregation Signals for Channel 1 ..............................................................................................13
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