2

4975BS–GPS–05/08

ATR0621P1

1.

Description

The GPS baseband processor ATR0621P1 includes a 16-channel GPS correlator and is based

on the ARM7TDMI processor core.

This processor has a high-performance 32-bit RISC architecture and very low power consump-

tion. In addition, a large number of internally banked registers result in very fast exception

handling, making the device ideal for real-time control applications. The ATR0621P1 has two

USART and an USB device port. This port is compliant with the Universal Serial Bus (USB) V2.0

full-speed device specification. The ATR0621P1 has a direct connection to off-chip memory,

including Flash, through the External Bus Interface (EBI).

The ATR0621P1 includes full GPS firmware, licensed from u-blox AG, which performs the basic

GPS operation, including tracking, acquisition, navigation and position data output. For normal

PVT (Position/Velocity/Time) applications, there is no need for off-chip Flash memory or ROM.

The firmware supports e.g. the NMEA

configuration and debugging, the RTCM protocol for DGPS, SBAS (WAAS, EGNOS and MSAS)

and A-GPS (aiding). It is also possible to store the configuration settings in an optional external

EEPROM.

ing the ARM7TDMI microcontroller core with on-chip SRAM, 16-channel GPS correlator and a

wide range of peripheral functions on a monolithic chip, the ATR0621P1 provides a highly-flexi-

ble and cost-effective solution for GPS applications.