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