To download the Tools, Driver, and Firmware use the following link:
https://youyeetoo.com/blog/banana-pi-bpi-m4bp0021-36

Introduction

Banana Pi BPI-M4 uses Realtek RTD1395 chip design, a 64-bit quad-core A53 mini single board computer. It features 1 GB/2GB of RAM and 8 GB eMMC. It also has onboard WiFi for b/g/n/ac and BT 4.2. On the ports side, the BPI-M4 has 4 USB 2.0 ports, 1 USB TYPE C port, 1 HDMI port, and 1 audio jack. support M.2 Key E PCIE

2.0 interface.

The RTD1395 is equipped with a high-performance quad-core CPU, ARM cortex-A53, with a 512K L2 cache embedded. the RTD1395 also integrates and efficient ARM Mali-470 Graphic Processing Unit(GPU) to accelerate 2D and 3D graphics processing. For acceleration of this OSD and 2K user interface, the built-in Streaming Engine of the RTD1395 provides commonly used drawing functions. The CPU is dedicated to applications, while most of the functions of the RTD1395 are dedicated to manipulating and decoding video streams in various formats.e.g. decoding 4K2K H.265,Full HD MPEG1/2/4/H.264/H.264 MVC,AVC/VC-1,VP8,VP9,AVS,AVS plus,HD JPEG,etc. Video DSP can also handle encoding of up to Full HD with H.264 format. Video decoding and encoding can run simultaneously.

Key Features

• Realtek RTD1395 ARM Cortex-A53 Quad-Core 64 Bit

• Mali 470 MP4 GPU OpenGL ES 1.1/2.0 H.264 H.265,2K4K

• Onboard1 GB DDR4 (option 2 GB)

• 8G eMMC flash (max 64 GB)

• 10/100 Mbit/s Ethernet and RTL8821 module support Wi-Fi 802.11 b/g/n/AC + Bluetooth 4.2

• USB 2.0 TYPE C

• M.2 Key E slot PCIE 2.0 and USB 2.0

• PoE function support

Hardware

Hardware interface

Hardware spec

GPIO PIN define

Banana Pi BPI-M4 has a 40-pin GPIO header Following is the Banana Pi GPIO Pinout:

UART specification:

The header CON2 is the UART interface. For developers of Banana Pi, this is an easy way to get the UART console output to check the system status and log messages.