User manual for the Hezhou Core_Air780E development board covering hardware overview, pinout, power, operation and firmware upgrade.
The Core_Air780E development board, released by Hezhou Communication, provides a minimal hardware platform for evaluating the Air780E module. It includes power, SIM, USB, antenna, audio and other essential interfaces to support performance testing, functional debugging and software development.
The manual describes board configuration, pin definitions, peripheral layout, power supply options, power‑on/off procedures, firmware upgrade steps and antenna usage, plus a Q&A section addressing common concerns such as power consumption differences and download mode entry. This manual is written in Chinese.
| IO default voltage | 3.3 V (1.8 V adjustable) |
|---|---|
| USB power input | 5 V via USB‑C |
| Antenna type | 4G spring antenna (optional IPEX) |
| SIM slot | Self‑ejecting MicroSIM holder |
| LED indicators | Power LED and network LED |
| Header spacing | Standard 2.54 mm pin holes |
| Audio output | 1 channel via built‑in codec (no amp) |
| LCD interface | SPI LCD compatible with Hezhou LCD expansion board |
| User buttons | Power, download mode, reset |
| ADC channels | 2 analog inputs |
| I2C bus | 1 I2C interface |
The EVB_Air780E board is intended for software debugging and includes extra components such as a DCDC converter, LEDs and LDOs, which add leakage current and therefore the measured consumption is higher than the module‑only specifications.
Hold the download‑mode (boot) button, then press and hold the power button; the board will enter download mode and the LuatTool progress bar will start.