GENERAL DESCRIPTION
The RTL8771B(W/F) supports up to 210 PRN channels, including 22 simultaneous tracking channels. The RTL8771B(W/F) also provides various navigation applications including SBAS/DGPS (WAAS, MSAS, EGNOS, GAGAN, etc.) and AGPS, which speeds the positioning time. An always-on backed-up memory and a real time clock are provided to accelerate acquisition at system restart up. With an on-chip integrated LNA, RTL8771B(W/F) delivers a total receiver noise figure of 2.6 dB (before ADC). RTL8771B(W/F) has on chip regulators easily integrated into your system without extra voltage regulator. The crystal supporting feature allows users to implement low-cost design circuit with minimum BOM cost. With an embedded 32-bits RISC controller running at 87/43.5MHz, the system performs time-critical processes, including data decoding and positioning. The real-time operating system also allows for efficient task scheduling. jkc The RTL8771B(W/F) offers an RS-232 data port and I2C interface for data exchange.
Realtek
