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CMD display controller features MDDI-based serial client

Posted: 10 Oct 2006 ?? ?Print Version ?Bookmark and Share

Keywords:California Micro Devices? MSM chipset? CM5100? serial interface? display controller?

CMD's CM5100 display controller

California Micro Devices has introduced a serial interface display controller for wireless handsets that incorporates the VESA Standard Mobile Display Digital Interface (MDDI) link, which is fully compatible with Qualcomm's Mobile Station Modem chipset.

The CM5100 is a dual display and audio controller that features a fully compliant, MDDI-based serial client, an integrated display controller with embedded memory that supports primary TFT LCDs with resolutions up to QVGA (320 x 240) and secondary displays with up to QCIF+ (176 x 220) resolution. The CM5100's architecture is optimized for use with TFT LCD modules that feature drivers integrated directly on the display glass. It also allows the use of low-cost, RAM-less drivers for non-integrated display modules.

The CM5100 supports all necessary video, audio and control packet types recommended by the MDDI specification. The integrated MDDI client transceiver is Type I (internal mode, 15cm maximum cable length), consisting of one data pair, one strobe pair and a dedicated power supply pair that can support data rates of up to 385Mbps. As a result, the CM5100 requires only six lines operating at lower power compared to traditional parallel interfaces that could include up to 60 lines to control both displays and other resources.

The internal video mapper contained in the CM5100 enables it to operate as a display controller with an integrated frame buffer for a main panel of up to QVGA resolution through a standard RGB interface, and support a secondary "smart" display through a CPU type of interface. Audio packets can also be transferred through the MDDI pipe and be redirected to a local stereo audio codec through the I?S interface. The I?C host interface allows connecting the CM5100 to any I?C slave device allowing it to be controlled through the MDDI interface.

Housed in a 100-bump, 0.5mm pitch wafer level chip scale package with a form factor of 5-by-5mm, the CM5100 is claimed to be the industry's smallest MDDI based display controller.

Evaluation boards and chip samples of the CM5100 are available today. Chip pricing starts at $6 in 1,000-unit quantities. Volume production is scheduled for Q4 2006.

- Ismini Scouras

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