COMMUNICATION SOLUTIONS

GPS Reference Design as Complete Solution

STMicroelectronics offers a complete GPS reference design for consumer and automotive markets, based on its STA2058 Teseo GPS baseband coupled with an STA5620 single-chip RF front end. The reference design, supported with a software library, allows rapid product development.

The 25mm x 25mm reference design module is particularly suited to hand-held and Portable Navigation Device (PND) applications. The use of the STA2058 Teseo chip confers high GPS sensitivity of -159dBm in tracking and -146dBm in warm start acquisition.



The Teseo device includes up to 256KByte embedded Flash memory. This allows it to store GPS receiver code, including tracking, acquisition, navigation and data output routines supplied by STMicroelectronics, as well as user-generated application software.

The STA5620 front end uses a low-IF architecture to down-convert a GPS L1 signal from 1575.42MHz to 4.092MHz. The device is designed to require the minimum of external components, integrating its own PLL/oscillator.

The STA2058 is itself based on an ARM7TDMI™ 32-bit microcontroller core and a High-Performance GPS engine (HPGPS) with a wide range of peripherals including 48 GPIOs, two I²Cs, one USB, two CANs, and a four-channel ADC. In addition, four UARTs and two SPIs are provided, with the option of data output in the standard National Marine Electronics Association format.

The device achieves a 2m autonomous positioning accuracy, with fast positioning-acquisition times of less than 2.5s for hot start and less than a second for reacquisition. It fully supports both the Wide Area Augmentation System (WAAS) and the European Geostationary Navigation Overlay Service (EGNOS).

Already available in Low profile Quad Flat Pack (LQFP) or Ball Grid Array (BGA) packages, ST Microelectronics will also offer the baseband and RF front-end devices integrated in a multi-chip module, designated STA8058. In keeping with their intended use within vehicles, Teseo devices are automotive grade compliant (AEC-Q100) and characterised for use within the -40°C to +85°C operating temperature range.

Features

• Complete GPS reference design
• Baseband, RF front end, layout schematics and software
• High GPS sensitivity
  • -159dBm tracking
  • -146dBm warm start
• Up to 256KByte embedded Flash memory
• Software library includes tracking, acquisition, navigation and data output routines
• Based on an ARM7TDMI 32-bit microcontroller
• Wide range of peripherals
  • 48 GPIOs
  • Two I²Cs
  • One USB
  • Two CANs
  • Four-channel ADC
  • Four UARTs
  • Two SPIs
• National Marine Electronics Association data output
• Supports WAAS and EGNOS
• 2m autonomous positioning accuracy
• Fast acquisition times
  • Less than 2.5s for hot start
  • Less than 1s for reacquisition
• Low-IF front end
• LQFP, BGA or multi-chip module
• AEC-Q100 compliant
• Operating temperature range: -40°C to +85°C

For further information, including a copy of the STA2058 Module Datasheet, please click here