This document introduces the features and characteristics of GlobalSat Technology Corporation's GPS ENGINE BOARD ET-212 product, including SiRF GSC2x high performance GPS Chip Set, very high sensitivity, extremely fast TTFF, compact size, one size component, support NMEA 0183 and SiRF binary protocol.
The ET-212 GPS Engine Board from GlobalSat integrates a SiRF GSC2x chipset with high sensitivity and fast time‑to‑first‑fix, offering 12‑channel tracking in a compact 27.9 mm × 20 mm × 3.4 mm package. It operates from a 3.3 V supply and supports NMEA 0183 and SiRF binary protocols.
The manual covers power requirements, pin assignments, recommended layout, and detailed software command formats for configuring NMEA output, datum selection, and debugging. It also includes example NMEA sentences and guidance on using a backup battery for warm‑start functionality.
| Chipset | SiRF GSC2x |
|---|---|
| Frequency | L1 1575.42 MHz |
| Channels | 12 |
| Sensitivity | -155 dBm |
| Power input | 3.3 V ±5 % DC |
| Dimensions | 27.9 mm × 20 mm × 3.4 mm |
| Operating temperature | -40 °C to +85 °C |
| Maximum velocity | 515 m/s |
| Backup battery voltage range | 2.0 V to 5.0 V |
It requires a 3.3 V ±5 % DC input power.
Use the PSRF103 command with parameters to set VTG output rate, e.g., "ăPSRF103,05,00,01,01*20" for 1 Hz constant output.
The backup battery voltage should be between 2.0 V and 5.0 V.