MIPI D-PHY Multilane Protocol Triggering and Decode

MIPI D-PHY Multilane Protocol Triggering and Decode

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MIPI D-PHY

MIPI (Mobile Industry Processor Interface) serial buses are the backbone for communication in mobile products. The serial bus interface provides content-rich points for debug and test. However, since these protocols transfer bits serially, using a traditional oscilloscope has limitations. Manually converting captured 1’s and 0’s to protocol requires significant effort, can’t be done in real-time, and includes potential for human error. As well, traditional scope triggers are not sufficient for specifying protocol-level conditions.

Extend your scope capability with the Keysight Technologies, Inc. MIPI D-PHY triggering and decode application. This application makes it easy to debug and test designs that include MIPI D-PHY buses using your Infiniium Series oscilloscope.

  • Perform MIPI D-Phy multilane protocol decode which includes 1, 2, 3 and 4 lane design implementation
  • Set up your scope to show MIPI D-PHY protocol decode in less than 30 seconds.
  • Get access to a rich set of integrated protocol-level triggers.
  • Save time and eliminate errors by viewing packets at the protocol level.
  • Use time-correlated views to quickly troubleshoot serial protocol problems back to their timing or signal integrity root cause.

The following are the MIPI D-PHY protocols and features that will be supported by the application.

  1. DSI specification v1.02 and v1.01 decode and triggering of short and long packets
  2. CSI specification v1.00 decode and triggering of short and long packets
  3. Low Power Data Transmission (LPDT) decode and triggering for DSI and CSI specifications
  4. CSI and DSI packets with and without Cyclical Redundancy Check (CRC) support
  5. DCS specification v1.02 decode and triggering
  6. Full decode Bus turnaround including direction
  7. Full decode of Escape entry commands including Ultra-Low Power State, Reset-Trigger, Tearing Effect, Acknowledge and others

MIPI D-PHY multilane protocol decode

Get access to a rich set of integrated protocol-level triggers. The application includes a suite of configurable protocol-level trigger conditions specific to MIPI D-PHY. When serial triggering is selected, the application uses software-based triggering.

With software-based protocol triggering, the oscilloscope takes signals acquired using scope channels and reconstructs protocol frames after each acquisition. It then inspects these protocol frames against specified protocol-level trigger conditions and triggers when the condition is met.  

Compact protocol using the full screen listing.

The protocol viewer window shows the index number, time stamp value identifier, packet type, and data values for each MIPI D-PHY packet. Data in the listing window can be saved to a .csv or .txt file for off-line.

Quickly move between physical and MIPI D-PHY protocol layer information using the time-correlated tracing marker. Display protocol content using embedded decode in the waveform area, Or, see protocol events in a compact listing format. Minor tick marks indicate clock transitions. Major tick marks indicate segments of the serial packet MIPI D-PHY measurements are automatically time-correlated with measurement on other scope channels

MIPI D-PHY decode embedded in waveform area

Utilize the oscilloscope waveform area to display decode information. Minor ticks indicate clock transitions and major ticks show segments within each MIPI D-PHY packet.