Test MIPI links in mobile computing products
The U4431A MIPITM M-PHY protocol analyser, following on from the earlier U4421A (pictured), for next-generation mobile computing applications, gives engineers in R&D and manufacturing deep insight into MIPI M-PHY-based designs.
“The M-PHY physical layer is critical to the implementation of next-generation mobile computing products, including smartphones, tablets and laptops,” said Joel Huloux, chairman of the MIPI Alliance. “Testing and validating the implementation of MIPI Alliance’s specification is essential for our members to deliver quality products. We are pleased to see Agilent delivering new tools for analyzing the UniPro interface.”
In today’s mobile computing products designers are adding multiple high-speed busses to manage multiple high-resolution cameras, high-speed peripherals, advanced graphics adapters, and massive memory buffers. This increasing demand for bandwidth has driven the expansion of the M-PHY specification to include four-lane, 6.0-Gbit/secoptions. The U4431A offers up to 16 GB of analysis memory on each lane, allowing designers to capture tens of seconds of system traffic, even at these high speeds.
In addition, the Agilent U4431A offers “Raw Mode,” a feature that lets designers see the time-correlated 8b/10b data that underlies each protocol. These states can be displayed as a waveform or listing, providing insight into how a packet is formed at the physical layer.
This visibility extends throughout the M-PHY protocol stack, allowing error detection from the physical layer to the link and from the transport layers to the high-level application layer. These views allow engineers to unravel data as it travels throughout the entire transmission process.
“Leading silicon manufacturers tell us that their technologies have the potential to place low-cost computing in front of every person on the planet,” said Ross Nelson, general manager of Agilent’s Digital Debug Solutions team. “A tool like Raw Mode helps them gain insight into every corner of their designs, helping them solve turn-on problems much faster, and allowing them to spend more time developing and optimizing features.”
The U4431A also offers tools to isolate and unravel specific events on the bus. Real-time triggers allow the detection of errors at each layer of the protocol, filters focus analytic tools on specific types of traffic, and traffic overviews and measurement markers help designers understand traffic from entire bursts to nanosecond-resolution detail.
The modular AXIe blade form of the U4431A allows users to analyse multiple M-PHY buses simultaneously. These M-PHY buses can be time-correlated with MIPI D-PHY CSI-2 and DSI-1, PCIe, DDR and HDMI buses or even generic high-speed logic analyser modules. Designers can purchase as many lanes and as much memory and protocol support as they need today, and upgrade in the future.
The introduction of UFS and UniPro support on the U4431A MIPI M-PHY analyzer marks Agilent’s entry into M-PHY protocol analysis. Additional announcements later this year will focus on SSIC (USB-3 on M-PHY), M-PCIe (PCIe on M-PHY), and CSI-3. These products will complement Agilent’s complete M-PHY solutions, including transmitter and receiver physical layer testing.
Agilent, www.agilent.com
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