EWM108-GN05S Made-in China Support BDS/GPS/GLONASS/Galileo/QZSS/SBAS multi-system joint positioning single system independent positioning GNSS differential positioning
[Communication interface]：UART
[Operating voltage]：1.8-3.6V
[Positioning system]：BDS/GPS/GLONASS/Galileo/QZSS/SBAS
[Communication protocol]： NMEA0183V4.1 and previous versions
[Product size]：12.2*16.0*3.1mm
[Introduction]：EWM108-GN05S is a high-performance dual-frequency GNSS positioning module equipped with the HD8040D chip solution of Huada Beidou. This GNSS satellite positioning module supports the new generation of Beidou-3 signal system and all global civil navigation satellite systems including BDS, GPS, GLONASS, Galileo, SBAS, QZSS, etc. It provides high-precision, high-sensitivity and low-power solutions for GNSS navigation applications, and can customize SPI, USB, CAN and I2C interface outputs.
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| Pin number | Pin name | Pin Direction | Pin usage |
| 1 | NC | - | - |
| 2 | Roy | enter | Select the operating mode, or wake up the signal input. |
| 3 | 1PPS | Output | Second pulse, 1 Pulse Per Second |
| 4 | NC | - | - |
| 5 | NC | - | - |
| 6 | NC | - | - |
| 7 | NC | - | - |
| 8 | PRRSTX | enter | Reset pin, external reset input, internal pull-up, low level is valid, if not used, it must be suspended |
| 9 | ANT_BIAS | Output | The current cannot exceed 35mA in the antenna power supply pin |
| 10 | GND | - | Modular |
| 11 | RF_IN | enter | Antenna signal input, impedance 50Ω |
| 12 | GND | - | Modular |
| 13 | GND | - | Modular |
| 14 | NC | - | - |
| 15 | NC | - | - |
| 16 | NC | - | - |
| 17 | NC | - | - |
| 18 | NC | - | - |
| 19 | NC | - | - |
| 20 | TXD | Output | Serial port output, 3.3V level |
| twenty one | RXD | enter | Serial port input, 3.3V level |
| twenty two | V_BCKP | Input/Output | Module power reserve, power reserve range is 1.8~3.6V |
| twenty three | VDD | enter | Power supply pin, power supply range: 1.8~3.6V |
| twenty four | GND | - | Modular |