Introduction
The ST20-GP1 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 and ST20 CPU (for control and position caluculations) 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
■ 32-bit ST20 CPU
• 16/33 MHz processor clock
• 25 MIPS at 33 MHz
• fast integer/bit operations
■ 4 Kbytes on-chip SRAM
• 130 Mbytes/s maximum bandwidth
■ Programmable memory interface
• 4 separately configurable regions
• 8/16-bits wide
• support for mixed memory
• 2 cycle external access
■ Serial communications
• Programmable UART (ASC)
• OS-Link
■ Vectored interrupt subsystem
• 2 dedicated interrupt pins
• 5 levels of interrupt
■ Power management
• low power operation
• power down modes
■ Professional toolset support
• ANSI C compiler and libraries
• INQUEST advanced debugging tools
■ Technology
• Static clocked 50 MHz design
• 3.3 V, sub micron technology
■ 100 pin PQFP package
APPLICATIONS
■ Global Positioning System (GPS) receivers
■ Car navigation systems
■ Fleet management systems
■ Time reference for telecom systems