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UM621 Automotive Grade Dual-frequency Multi-GNSS Integrated Positioning Module

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.

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Product Description

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

Channel96 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)2Horizontal: 1.5 m (Dual-frequency quad-system, open sky)
Positioning Error of INS only3D gyro error + 3D accelerometer error + speed signal error 2% × driving distance
Velocity Accuracy(RMS)30.1 m/s (GNSS)
1PPS20ns
Sensitivity

GNSS

Tracking           -162 dBm

Cold Start        -148 dBm

Hot Start          -158 dBm

Reacquisition   -160 dBm

GNSS Data Update Rate1 Hz / 5 Hz* / 10 Hz*
INS Data Update Rate50 / 100 Hz
Data FormatNMEA 0183, Unicore


Physical Specifications

Dimensions12.2 x 16.0 x 2.4 mm
Package24 pin SMD
Operating Temperature-40 °C ~ +85 °C
Storage Temperature-40 °C ~ +85 °C


Electrical Specifications

Voltage2.7 V ~ 3.6 V DC
LNA2.7 V ~ 3.3 V, < 100 mA
Power Consumption4168 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

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