GP2021

Features:

`12 Fully Independent Correlation Channels
`1PPS UTC Aligned Timing Output
`OnChip Dual UART and Real Time Clock
`Compatible with most 16 and 32 bit Microprocessors
`Memory Control Logic for ARM60 Microprocessor
`Low Voltage, Low Current PowerDown Mode
`Power Dissipation 150mW Typical
`Compatible with GP2015 and GP2010 RF Front Ends
`Battery Backup Voltage 2.2V (min)


Application

`GPS Navigation Systems
`High Integrity Combined GPSGLONASS Receivers
`GPS Geodetic Receivers
`Time Transfer Receivers


Pinout




Specifications

These are not the operating conditions, but are the absolute limits which if exceeded, even momentarily, may cause permanent damage.

To ensure sustained correct operation the device should be used within the limits given under Electrical Characteristics.
It is essential for bothV DD and V SS to be present before input signals are applied.

Supply Voltage (V DD ) from ground (V SS ): ................0.3 to+6.0V
Input Voltage (any input pin):................. V _SS 0.3V to V _DD + 0.3V
Output Voltage (any output pin): .............V _SS 0.3V to V _DD +0.3V
Storage Temperature: ........................................55°C to +150°C


Description

The GP2021 is a 12 channel C/A code baseband correlator for use in NAVSTAR GPS and GLONASS satellite navigation receivers. The GP2021 complements the GP2015 and GP2010 C/A code RF downconverters available from Mitel Semiconductor.

The GP2021 is compatible with most 16 bit and 32 bit microprocessors, especially those from Motorola and Intel, with additional onchip support for the ARM60 32 bit RISC processor. When the ARM60 is used, the onchip memory management functions allow implementation of a full GPS receiver with minimal external logic.

The GP2021 allows individual channel deactivation, for systems not requiring full 12 channel operation, to save power and processor loading. Receiver power may be further conserved by reducing the supply voltage to 2.2V under battery backup. Although all system functions are disabled, the 32.768kHz oscillator and Real Time Clock are maintained for the microprocessor to estimate satellite visibility at power on to reduce signal acquisition time.

A development system called the GPS Architect is available as a basis for receiver design using the GP2021 and associated products.