The Megawin MA104 is a USB 2.0 low‑speed UART bridge that follows the USB HID protocol and supports keyboards, mice, consumer devices, gamepads and custom data.
The MA104 bridges USB and UART, providing HID‑compatible interfaces for a variety of input devices. It operates in low‑power (100 mA) or high‑power (500 mA) USB modes and includes an on‑board 5 V‑to‑3.3 V regulator and 6 MHz crystal.
The manual contains a block diagram, application circuits, pin definitions, UART packet formats, and a demo‑board hardware/software guide with DLL API functions such as MA104_Connect, MA104_WriteData and MA104_ReadData. This manual is written in Chinese.
| USB Vendor ID | 0x0E6A |
|---|---|
| USB Product ID (low power) | 0x0109 |
| USB Product ID (high power) | 0x010F |
| Operating voltage | 4.0 V ~ 5.5 V |
| Low‑power current | 100 mA |
| High‑power current | 500 mA |
| UART baud rate | 19200 bps |
| Crystal frequency | 6 MHz ±1.5% |
| Operating temperature | 0 °C ~ 70 °C |
The MA104 can emulate keyboards, mice, consumer‑control devices, gamepads and user‑defined data streams.
UART operates at 19200 bps with 8‑data bits, no parity, 1 stop bit (8N1).