[Communication interface]：UART
[Operating voltage]： 2.7-53.6V
[Positioning system]：BDS
[Product size]： 9.7*10.5*2.4mm
[Introduction]：E108-GN03B single Beidou positioning and navigation module is a high-performance positioning and navigation module based on the sixth-generation SOC single Beidou chip AT6668B of Zhongkewei. It applies the new navigation integrated SOC single chip technology, which can meet the application of high-precision positioning and high-precision timing. It has the characteristics of high integration, high performance, low power consumption, and small size. It also supports Beidou-2 (B1I) and Beidou-3 (B1C) signals. This series of modules has three common packages and is compatible with the software and hardware interfaces of GNSS modules of other manufacturers. It can be used in vehicle navigation, wearable devices, mobile phones, IoT devices, drones and other application fields.
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| Pin number | Pin Name | Pin Direction | Pin Purpose |
| 1 | GND | - | Module Ground |
| 2 | TXD | Output | Serial port output, 3.3V level |
| 3 | RXD | enter | Serial port input, 3.3V level |
| 4 | 1PPS | Output | 1 Pulse Per Second |
| 5 | ON_OFF | enter | Sleep control pin, keep high level (internal pull-up) for normal operation, low level to enter sleep mode |
| 6 | V_BCKP | enter | RTC power supply, can charge external battery, internal series 100Ω resistor |
| 7 | NC | - | - |
| 8 | VCC | enter | Module power supply, power supply range: 2.7V-3.6V |
| 9 | RESET_N | enter | Reset pin, external reset input, internal pull-up, must be left floating if not used |
| 10 | GND | - | Module Ground |
| 11 | RF_IN | enter | Antenna interface |
| 12 | GND | - | Module Ground |
| 13 | ANT_ON | Output | Active antenna power supply control, for external active antenna switch control |
| 14 | VCC_RF | Output | RF power supply and detection, used to power active antennas (output power supply voltage equals VCC) |
| 15 | NC | - | - |
| 16 | NC | - | - |
| 17 | NC | - | - |
| 18 | MODEL_SET | enter | Satellite system mode selection, high level or floating for BDS + GPS, low level for GPS + GLONASS |