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