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