Description
CH32V305FBP6 RISC-V4F Industrial Grade microcontroller TSSOP20
General Description
The CH32V305FBP6 is a 32-bit industrial-grade microcontroller from WCH (Nanjing Qinheng Microelectronics), based on the RISC-V4F core with hardware floating-point unit (FPU). It delivers high performance, low power consumption, and rich peripheral integration, ideal for communication, control, and industrial automation applications.
⚙️ Key Specifications
| Parameter |
Specification |
| Core Architecture |
32-bit RISC-V4F with FPU |
| Operating Frequency |
Up to 144 MHz |
| Flash Memory |
64 KB embedded Flash |
| SRAM |
32 KB |
| Operating Voltage |
2.7 V – 5.5 V |
| I/O Pins |
Up to 18 GPIOs (package-dependent) |
| Package Type |
TSSOP-20 |
| Clock Sources |
Internal 24 MHz HSI, external crystal support |
| DMA Channels |
Up to 7 |
| Interrupts |
32 external interrupt sources |
| Timers |
4 × 16-bit general-purpose timers, 1 × SysTick |
| Watchdog Timers |
Independent & Window watchdogs |
| ADC |
12-bit ADC (up to 10 channels, 1 MSPS) |
| Communication Interfaces |
2 × USART, 1 × I²C, 1 × SPI, 1 × CAN |
| USB Interface |
Full-Speed USB 2.0 Device/Host/OTG |
| Ethernet Interface |
Supported in higher variants (not in FBP6) |
| Debug Interface |
RVSWD (RISC-V Serial Wire Debug) |
| Operating Temperature Range |
–40 °C to +85 °C (industrial grade) |
| ESD Protection |
±4 kV (HBM) typical |
| Power Consumption |
~50 µA in Stop mode |
🔌 Peripheral Highlights
🔹 USART
-
Up to 2 UART/USART interfaces
-
Supports baud rates up to 4.5 Mbps
-
Hardware flow control, LIN, IrDA modes
🔹 SPI / I²C
🔹 USB 2.0
🔹 ADC
-
12-bit SAR ADC
-
Up to 1 MSPS sampling
-
Multiple input channels
🔹 Timers
-
16-bit general purpose, PWM capable
-
Input capture, output compare, pulse measurement
⚙️ Electrical Characteristics
| Parameter |
Min |
Typ |
Max |
Unit |
| Operating Voltage |
2.7 |
3.3 |
5.5 |
V |
| I/O Voltage (5 V tolerant) |
– |
Yes |
– |
– |
| Flash Endurance |
– |
100 K |
– |
cycles |
| Data Retention |
– |
20 |
– |
years |
| CPU Current (Run, 3.3 V @ 72 MHz) |
– |
20 |
– |
mA |
| Sleep Mode Current |
– |
1 |
– |
µA |
💡 Main Features
-
High-performance RISC-V4F CPU with FPU
-
Integrated USB, CAN, SPI, I²C, UART, ADC, Timers
-
5 V-tolerant I/O pins
-
Industrial temperature range for harsh environments
-
Low-power operation and multiple sleep modes
-
Compatible with WCH-LinkE and WCH-LinkW debuggers
-
Free SDK support via MounRiver Studio or PlatformIO
⚙️ Typical Applications
-
Industrial control and automation
-
USB data acquisition devices
-
Sensor interface and measurement systems
-
Communication gateways (UART-CAN-USB)
-
Smart home and IoT controllers
-
Embedded instrumentation
📦 Package Information
| Package |
Pins |
Pitch |
Body Size |
| TSSOP-20 |
20 |
0.65 mm |
6.5 mm × 4.4 mm |
🔧 Programming & Development
-
Programmer/Debugger: WCH-LinkE or WCH-LinkW
-
IDE Support: MounRiver Studio, Keil (RISC-V plugin), PlatformIO
-
Toolchain: riscv-none-embed-gcc
-
Firmware Upload: via SWD or UART bootloader
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