Replacing the STM32F407 with the GX32F407 MCU, Which Is Widely Used in Home Audio Equipment

With the rapid popularization of the smart home industry, home audio equipment has evolved from traditional single-function playback speakers into intelligent terminals integrating high-fidelity audio playback, real-time sound effect processing, voice human-machine interaction, Bluetooth wireless transmission, and smart linked control. The equipment mainly includes six core modules: audio acquisition, signal processing, decoding and playback, sound effect tuning, human-machine interaction, and intelligent communication. This article recommends using a GXSC main control chip with strong computing performance and stable audio transmission to carry the home audio system architecture.

The GX32F407 MCU uses a high-performance 32-bit core with an operating frequency of 168MHz. The 32-bit core includes a floating-point unit and also supports DSP instructions and memory protection to enhance application security. Its computing efficiency is more than 30% higher than that of traditional Cortex-M3 core chips. This series of MCUs has built-in high-speed memory (up to 1MB of Flash and 320KB of SRAM), up to 4KB of backup domain SRAM, rich enhanced I/O ports, and peripherals connected to two APB buses.

The GX32F407 MCU has an operating temperature of -40 to +105°C and a supply voltage of 1.8 to 3.6V. Through the design of a series of energy-saving modes, it can be applied in some low-power occasions. The GX32F407 MCU provides four different package types ranging from 64 pins to 176 pins; depending on the package type, the peripheral configurations in the device are not exactly the same. Its features are as follows:

● LCD parallel interface, 8080/6800 mode

● 1.8V to 3.6V application supply and I/O

● 3 12-bit, 2.4 MSPS A/D converters

● 2 12-bit D/A converters

● Up to 17 timers: up to 12 16-bit and 2 32-bit timers, up to 168MHz

● Supports multiple low-power modes (sleep mode, stop mode, standby mode)