This is the upgrade for the U4421A MIPI D-PHY Analyzer/Exerciser.
The U4421U is the model number used for all upgrades to the U4421A Exerciser/Analyzer.
| Option | Description |
| 601 | Add D-PHY Analyzer |
| 602 | Add D-PHY Exerciser |
| 402 | Increase from 1 to 2 lanes |
| 404 | Increase from1 to 4 lanes |
| M04 | Increase memory depth from 1 GB to 4 GB |
| M16 | Increase memory depth from 1 GB to 16 GB |
| 701 | Add Camera Serial Interface (CSI-2) license |
| 702 | Add Display Serial Interface (DSI-1) license |
| 703 | Add CSI and DSI licenses |
| 001 | Add Image Extractor Package |
| 003 | Add Image Inserter Package |