CH549G

The CH549G is a microcontroller from WCH (Nanjing Qinheng Microelectronics), based on the RISC-V architecture. It features a 32-bit core with up to 48 MHz clock speed, integrated USB 2.0 Full-Speed, 12-bit ADC, PWM, UART, SPI, and I²C interfaces. It also includes 64KB Flash and 4KB SRAM, making it suitable for embedded applications like IoT, consumer electronics, and industrial control.
Key highlights:
- RISC-V core (efficient & open-source ISA)
- USB 2.0 support (host/device modes)
- Low-power modes for energy efficiency
- Rich peripherals (ADC, PWM, timers, etc.)
- Compact & cost-effective for embedded designs
Ideal for developers seeking a low-cost, versatile MCU with USB connectivity and RISC-V benefits.

The CH549G is a USB microcontroller by WCH. Equivalent products include:
- CH559G: Similar USB MCU with enhanced features.
- CH552G: Lower-cost variant with basic USB support.
- STM32F103: ARM-based alternative (e.g., Blue Pill board).
- ATmega32U4: AVR-based USB MCU (used in Arduino Leonardo).
- PIC18F4550: Microchip’s USB-capable MCU.
Check pin compatibility and feature requirements when substituting.

The CH549G is a cost-effective, enhanced 8051-core MCU by WCH, featuring:
- Core: 1T 8051, up to 24 MHz
- Memory: 16KB Flash, 1KB RAM, 128B EEPROM
- Peripherals:
- USB 2.0 Full-Speed (device/host)
- 12-bit ADC, 8-channel
- 4x 16-bit timers, PWM, UART, SPI, I²C
- Touch key detection (TKEY)
- Power: 2.7–5.5V, low-power modes
- Package: TSSOP20, compact design
Ideal for USB/HID devices, sensors, and embedded control.

The CH549G is a 20-pin microcontroller from WCH. Key features include:
- Pin Count: 20 pins (TSSOP-20 package).
- Core: Enhanced 8051 (1T mode, up to 24MHz).
- Memory: 16KB Flash, 256B RAM, 1KB EEPROM.
- Peripherals:
- USB 2.0 Full-Speed (supports host/device).
- 12-bit ADC, PWM, UART, SPI, I²C.
- 15 GPIOs (some multiplexed).
- Power: 2.7V–5.5V operation.
Used for USB-HID, embedded control, and low-cost USB applications.

The CH549G is manufactured by WCH (Jiangsu Qinheng Microelectronics Co., Ltd.), a Chinese company specializing in microcontroller units (MCUs), communication chips, and IoT solutions.
WCH is known for cost-effective, low-power chips, particularly for USB, Ethernet, and embedded applications. Their products are widely used in consumer electronics, industrial control, and smart devices. The CH549G is an 8-bit MCU with USB functionality, targeting compact, power-efficient designs.
The company is recognized for its strong presence in China’s domestic semiconductor market and competitive pricing.

The CH549G microcontroller is widely used in:
- Consumer Electronics: Keyboards, mice, game controllers.
- Industrial Control: Sensors, motor control, automation.
- IoT Devices: Smart home gadgets, wearables.
- USB Peripherals: HID devices, USB-C PD controllers.
- Battery Management: Charging circuits, power monitoring.
It features USB 2.0, 8051 core, and rich peripherals, making it versatile for cost-sensitive embedded applications.

The CH549G microcontroller is available in a TSSOP-20 package. This surface-mount package has 20 pins, a compact footprint, and is suitable for space-constrained applications. It supports USB and other peripherals, making it ideal for embedded systems.