UM621 is a GNSS dual-frequency + MEMS integrated navigation module developed by Unicore Communications. Based on the proprietary multi-system dual-frequency high-performance SoC-UC6580I, and equipped with a 6-axis MEMS device, the module supports multi-system dual-frequency joint positioning or single-system standalone positioning, and can directly output GNSS + MEMS integrated positioning results, which ensures the continuity of positioning even in tunnels or underground parking lots.
Product Characteristics
Industrial grade dual-frequency GNSS+MEMS integrated navigation and positioning module
Supports GPS L1 C/A, L5; BDS B1I, B1C*, B2a; GLONASS G1; Galileo E1, E5a; NavIC L5*; QZSS and SBAS
Supports multi-system dual-frequency positioning, multi-system single-frequency positioning or single-system standalone positioning
Built-in MEMS to output integrated positioning results with a single module
Supports odometer pulse input
Supports the output of integrated positioning results and GNSS-only positioning results through one serial port
100% continuous navgation even in tunnels or underground parking lots
Algorithm adaptable to low-dynamic application scenarios
Performance Specifications
Channel | 96 channels, based on UFirebirdII |
Frequency | GPS L1C/A, L5 BDS B1I, B1C*, B2a GLONASS G1 Galileo E1, E5a NavIC L5* QZSS L1, L5 SBAS |
Positioning Mode | Single-System Standalone Positioning Multi-System Joint Positioning |
Time to First Fix (TTFF)1 | Cold Start: < 26 s Hot Start: < 2 s Re-acquisition : < 2 s |
Positioning Accuracy(CEP)2 | Horizontal: 1.5 m (Dual-frequency quad-system, open sky) |
Positioning Error of INS only | 3D gyro error + 3D accelerometer error + speed signal error 2% × driving distance |
Velocity Accuracy(RMS)3 | 0.1 m/s (GNSS) |
1PPS | 20ns |
Sensitivity | GNSS Tracking -162 dBm Cold Start -148 dBm Hot Start -158 dBm Reacquisition -160 dBm |
GNSS Data Update Rate | 1 Hz / 5 Hz* / 10 Hz* |
INS Data Update Rate | 50 / 100 Hz |
Data Format | NMEA 0183, Unicore |
Physical Specifications
Dimensions | 12.2 x 16.0 x 2.4 mm |
Package | 24 pin SMD |
Operating Temperature | -40 °C ~ +85 °C |
Storage Temperature | -40 °C ~ +85 °C |
Electrical Specifications
Voltage | 2.7 V ~ 3.6 V DC |
LNA | 2.7 V ~ 3.3 V, < 100 mA |
Power Consumption4 | 168 mW |
Functional Ports
2 × UART (LVTTL)
1 × I2C
1 × SPI
1 × SPEED
1 × FWD
1 × 1PPS (LVTTL)
Functional Characteristics
Passive Antenna, Active Antenna
AGNSS*
Note: Items marked with * are only supported by specific firmware.
1 Open sky
2 Typical value, < 30 m/s open sky
3 68% at 30 m/s for dynamic operation,open sky
4 Open sky, continuous tracking