Description
The GP4020 is a complete digital baseband processor for a Global Positioning System (GPS) receiver. It combines the 12-channel correlator function of the GP2021 with an advanced ARM7TDMI (Thumb) microprocessor to achieve a higher level of integration, reduced system cost, reduced power consumption and added functionality. The GP4020 complements the GP2015 and GP2010 C/A code RF downconverters available from Zarlink Semiconductor.

FEATUREs
• Complete GPS correlator and Firefly MF1 microcontroller core
• ARM 7TDMITM (Thumb®) Microprocessor, with JTAG ICEBreakerTM Debug Interface
• Fully Configurable External Data Bus
• 12 Fully Independent Correlation Channels
• Low Voltage Operation: 3·3V
• Low Current Power–Down Mode
• 1PPS UTC Aligned Timing Output
• Dual UART
• 3-wire BµILD Serial Input/Output (BSIO) Interface
• 8 General Purpose Input/Output (GPIO) Lines
• Boot ROM, allowing Software Upload via UART
• 8K Bytes Internal SRAM
• Compatible with GP2015 and GP2010 RF Front Ends

APPLICATIONs
• GPS Navigation Systems
• GPS Geodetic Receivers
• Time Transfer Receivers
• Automatic Vehicle Location (AVL)
• E911 Emergency Positioning