Introduction
The ST20-GP6 is an application-specific single chip micro using the ST20 CPU with microprocessor style peripherals added on-chip. It incorporates DSP hardware for processing the signals from GPS (Global Positioning System) satellites.

FEATURES
■ Application specific features
    • 12 channel GPS correlation DSP hardware, ST20 CPU (for control and position calculations) and memory on one chip
    • no TCXO required
    • RTCA-SC159 / WAAS / EGNOS supported
■ GPS performance
    • accuracy
        - stand alone with SA on <100m, SA off <30m
        - differential <1m
        - surveying <1cm
    • time to first fix
        - autonomous start 90s
        - cold start 45s
        - warm start 7s
        - obscuration 1s
■ Enhanced 32-bit VL-RISC CPU - C2 core
    • 16/33/50 MHz processor clock
    • 25 MIPS at 33 MHz
    • fast integer/bit operations
■ 64 Kbytes on-chip SRAM
■ 128 Kbytes on-chip ROM
■ Programmable memory interface
    • 4 separately configurable regions
    • 8/16-bits wide
    • support for mixed memory
    • 2 cycle external access
■ Programmable UART (ASC)
■ Parallel I/O
■ Vectored interrupt subsystem
■ Diagnostic control unit
■ Power management
    • low power operation
    • power down modes
■ Professional toolset support
    • ANSI C compiler/link driver and libraries
    • Debugging/profiling and simulation tools
    ■ Technology
    • Static clocked 50 MHz design
    • 3.3 V, sub micron technology
■ 100 pin PQFP package
■ JTAG Test Access Port

APPLICATIONS
■ Global Positioning System (GPS) receivers
■ Car navigation systems
■ Fleet management systems
■ Time reference for telecom systems