CSR SiRFstarIV GSD4e GPS Location Processor for Mobile Devices

CSR announced the SiRFstarIV GSD4e GPS location processor for mobile devices. The single-chip features high-performance, micro-power capabilities, built-in CPU, and SiRFGeoRecov technology that is optimized to ensure continuous location awareness in a new breed of digital cameras, portable game consoles, wearable platforms, and other consumer devices, without loading the host processor. The CSR SiRFstarIV GSD4e GPS engine with external flash memory is available in sample quantities this month. The ROM version will be available later this quarter. Production quantities are scheduled for the first quarter of 2010.

The GSD4e’s adaptive accuracy and SiRFGeoRecov technologies make it possible to instantly geo-tag images or videos with a camera or camcorder and improve the accuracy as better GPS information becomes available. It also enables people to locate social networking friends on a smartphone, track a jogging course with a wearable device, perform location-based searches with a laptop or netbook or find their way through buildings and urban canyons with a pedestrian navigation system. And it can do all these things in everyday environments, and in many cases even if the device has been turned off for weeks or months.

Unlike other GPS solutions on the market today that many times fail to provide any location fix at all, the GSD4e ensures that devices are on the “location grid,” even in extremely low signal conditions. And the GSD4e’s sophisticated motion-sensing algorithms ensure advanced power management and stable, accurate positioning, even when standing still.

The GSD4e can navigate to -160 dBm and track to -163 dBm, and for smartphone customers the GSD4e offers an extraordinary 7.5-dB 3GPP pass margin and high E911 sensitivity to ensure success in virtually any handset design. It also offers a fully certified A-GPS protocol stack with quick drop-in to multiple smartphone operating systems. The GSD4e consumes only 8 mW in 1-Hz TricklePower mode, and can maintain hot-start conditions continuously in SiRFaware mode while drawing as little as 50-400 microampere. Its enhanced SiRFNavPlus navigation engine ensures seamless car and pedestrian navigation in extremely tough urban canyon and dense foliage environments.

The GSD4e features SiRFInstantFix synthetic ephemeris technology as a standard feature for even greater performance. On-chip active jammer removal, a key feature of the SiRFstarIV architecture, not only eliminates electrical noise commonly associated with the motors, LCD screens and other components commonly found in smartphones, cameras, game consoles and other consumer devices, but also pinpoints for designers much earlier in the development process the precise strength and source of these interfering signals, enabling them to be contained in the design phase rather than in later, more costly test phases. The GSD4e also supports a full range of satellite-based augmentation systems, including WAAS, EGNOS, MSAS and GAGAN.

The GSD4e is available in both ROM and flash supported versions. The ROM version measures a 3.5 mm x 3.2 mm, and comes in a 42-ball, 0.5-mm pitch wafer level chip scale (WLCSP) package. The flash version measures 5 mm x 7.2 mm, and comes in a 103-ball, 0.5-mm pitch ball grid array (BGA) package.

The GSD4e combines RF receiver and integrated LNA, baseband circuitry, switcher and low-current LDOs on a single chip, and requires only five to six external passive components and a single SAW to provide a complete solution that occupies less than 25 square millimeters, including switcher parts.

More info: CSR