NEC Electronics Announces World’s First Implementation of Mobile CMADS™ High Speed Serial Interface Technology in Mobile Handsets

NEC Electronics has announced that its µPD161833M and µPD161605M LCD driver ICs, based on its Mobile CMADSTM (Current Mode Advanced Digital Signaling) high-speed serial data transmission method, will be employed in select NEC mobile handsets from the fall of 2005. This marks the first successful implementation of cutting-edge display drivers with integrated receiver circuits, as well as the first use of NEC Electronics’ Mobile CMADS technology, designed to enhance data transmission speed, performance, and mobile handset design.

With the growth of third generation (3G) handsets with high-definition displays and video processing functions, the volume of information transmitted between the display and the main terminal has multiplied dramatically. Data transmission rates for 3G handsets now typically exceed 90 megabits per second (Mbps) for quarter video graphics array (QVGA) and 460 Mbps for video graphics array (VGA) displays. Moreover, this data must be passed through a narrow connection using serial wiring between the display and the main terminal, but there are several challenges associated with conventional serial technology such as high power consumption and electromagnetic interference (EMI) noise.

NEC Electronics’ advanced Mobile CMADS solves the problems of serial interface technology. By decreasing the number of data transmission lines between the narrow LCD and main handset to 4 lines (as compared to 18 lines for parallel technology), circuit board design is simplified, facilitating creative handset designs such as swivel-type models. Mobile CMADS also reduces EMI noise by approximately 35%, and lowers power consumption levels to the equivalent of parallel transmission levels, while still delivering the fast data transmission rates that are only possible with serial technology.

 NEC’s implementation of the µPD161833M and µPD161605M LCD driver ICs is expected to be the first step in a wider industry adoption of the Mobile CMADS technology and products. NEC Electronics will continue to promote Mobile CMADS by implementing it in the company’s MP211 application processor, and advancing it among mobile handset manufacturers and other semiconductor companies as a global industry standard.

For more information about NEC Electronics’ LCD driver ICs and Mobile CMADS technology, please visit http://www.necel.com/partic/display/english/displaydriver/index.html

Attachment

Mobile CMADSTM (Mobile CMADS 1000) Specifications
Transmission method:  Current-mode differential transmission
Data transfer rate:  70 Mbps/pair
Number of data signal lines:  2 (1 pair) mode/4 lines (2 pairs)
Signal amplitude:  85 mVpp
Transmission circuit format:  N-ch open-drain transistor
Power consumption per pair:  2 to 3 mW

Major specifications of µPD161833M and µPD161605M

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