WCH32V DB
Basic Overview #
CH32V003 series is an industrial-grade general-purpose microcontroller designed based on QingKe RISC-V2Acore, which supports 48MHz system main frequency in the product function. The series features wide voltage,single line debug, low-power consumption and ultra-small package. It provides commonly used peripheralfunctions, built-in 1 group of DMA controller, 1 group of 10-bit analog-to-digital conversion ADC, 1 group ofop-amp comparator, multiple timers, standard communication interfaces such as USART, I2C, SPI, etc. The rated operating voltage of the product is 3.3V or 5V, and the operating temperature range is -40℃～85℃ industrial-grade.
Feature List #
| Feature | Value | Unit/Note |
|---|---|---|
| Core | ||
| CPU | QingKe 32-bit RISC-V (RV32EC) | Instruction set |
| Interrupts | Fast PIC + hardware interrupt stack | — |
| Nesting | 2-level | Interrupt nesting |
| System clock | 48 | MHz main frequency |
| Memory | ||
| SRAM | 2 | KB volatile data storage |
| CodeFlash | 16 | KB program memory |
| BootLoader | 1920 | B |
| System config NVM | 64 | B non-volatile |
| User NVM | 64 | B user-defined |
| Power management & low-power | ||
| VDD | 3.3 / 5 | V supply |
| Low-power modes | Sleep, Standby | — |
| Clock & Reset | ||
| RC oscillator (HSI) | 24 | MHz, factory-trimmed |
| RC oscillator (LSI) | 128 | KHz |
| External oscillator | 4–25 | MHz high-speed crystal |
| Reset/voltage | POR/PDR + PVD | Power on/down reset, programmable voltage detector |
| DMA & Analog | ||
| DMA | 1 group, 7 channels | Ring buffer; TIMx/ADC/USART/I2C/SPI |
| OPA & comparator | 1 group | Connected to ADC & TIM2 |
| ADC | 10-bit | 0–VDD; 8 external + 2 internal; external delayed trigger |
| Timers | ||
| Advanced timer | 1 × 16-bit | Dead-zone, emergency brake, complementary PWM |
| General-purpose timer | 1 × 16-bit | IC/OC/PWM/pulse counting/incremental encoder |
| Watchdogs | 2 | Independent + window watchdog |
| SysTick | 32-bit | Counter |
| Communication interfaces | ||
| USART | 1 | — |
| I2C | 1 | — |
| SPI | 1 | — |
| GPIO | ||
| Ports | 3 groups / 18 I/O | — |
| EXTI | 1 | Mapped external interrupt |
| Security / Debug / Package | ||
| Unique ID | 64-bit | — |
| Debug | 1-wire SDI | Serial debug interface |
| Package | SOP / TSSOP / QFN | — |
Development Board Configuration #
The detailed assignment of the peripheral interfaces on the Development board is as follows:
| NO. | Name | Silkscreen | Comment |
|---|---|---|---|
| 1 | Programing pin | – | You can program the development board with the one-wire protocol. |
| 2 | 11 pin | – | Ch32v Output pin |
| 3 | 3 pin | – | select voltage power supply 3.3V,5V |
The Development board has 2 functional indication LEDs, as follows:
- Connect to PC0(10) pin wch.
- Power indication LED.
Development Board Dimensions #
Development Board Interfaces #
The main pin placement of the Development board is shown in the following figure:
| SOP16 | TSSOP20 | QFN20 | SOP8 | Pin name | Pin type (1) | I/O structure | Main function (after reset) | Default alternate function |
|---|---|---|---|---|---|---|---|---|
| – | – | 0 | – | VSS | P | VSS | – | – |
| 8 | 1 | 18 | 8 | PD4 | I/O | PD4 | UCK/T2CH1ETR/A7/OPO | TICH4ETR_(1) |
| 9 | 2 | 19 | 8 | PD5 | I/O | PD5 | UTX/A5 | T2CH4_/URX_ |
| 10 | 3 | 20 | 1 | PD6 | I/O | PD6 | URX/A6 | T2CH3_/UTX_ |
| 11 | 4 | 1 | – | PD7 | I/O | PD7 | NRST/T2CH4/OPP1 | UCK_ |
| 12 | 5 | 2 | 1 | PA1 | I/O | PA1 | T1CH2/A1/OPN0 | OSCI |
| 13 | 6 | 3 | 3 | PA2 | I/O | PA2 | TICH2N/A0/OPP0 | OSCO/AETR2_ |
| 14 | 7 | 4 | 2 | VSS | P | VSS | – | – |
| – | 8 | 5 | – | PD0 | I/O | PD0 | TICH1N/OPN1 | SDA_/UTX_ |
| 15 | 9 | 6 | 4 | VDD | P | VDD | – | – |
| 16 | 10 | 7 | – | PC0 | I/O | PC0 | T2CH3 | NSS_/UTX_/T1CH3_ |
| 1 | 11 | 8 | 5 | PC1 | I/O/FT | PC1 | SDA/NSS | T1BKIN_/T2CH4_/T2CH1ETR_/URX_ |
| 2 | 12 | 9 | 6 | PC2 | I/O/FT | PC2 | SCL/URTS/T1BKIN | AETR_/T2CH2_/T1ETR_ |
| 3 | 13 | 10 | – | PC3 | I/O | PC3 | T1CH3 | T1CH1N_/UCTS_ |
| 4 | 14 | 11 | 7 | PC4 | I/O | PC4 | T1CH4/MCO/A2 | T1CH1CH2N_(2) |
| – | 15 | 12 | – | PC5 | I/O/FT | PC5 | SCK/T1ETR | T2CH1ETR_/SCL_/UCK_/T1CH3_ |
| 5 | 16 | 13 | – | PC6 | I/O/FT | PC6 | MOSI | T1CH1CH3N_(3)/UCTS_/SDA_ |
| 6 | 17 | 14 | – | PC7 | I/O | PC7 | MISO | T1CH2_/URTS_/T2CH2_ |
| 7 | 18 | 15 | 8 | PD1 | I/O | PD1 | SWIO/T1CH3N/AETR2 | SCL_/URX_ |
| – | 19 | 16 | – | PD2 | I/O | PD2 | T1CH1/A3 | T2CH3_/T1CH2N_ |
| – | 20 | 17 | – | PD3 | I/O | PD3 | A4/T2CH2/AETR/UCTS | T1CH4_ |
Getting Started Preparation #
To program this series of RISC_V microcontrollers, we use the MounRiver Studio software, abbreviated as MRS.
To download this IDE, you can visit the MounRiver Studio website at http://www.mounriver.com/download
This IDE has the ability to program WCH chips internally; but if you want to use external software for programming, you can use the WCH-LinkUtility software, which can be downloaded from the WCH company website.
At https://www.wch.cn/downloads/WCH-LinkUtility_ZIP.html
You can use WCH–Link.
To connect the programmer to the micro, the GND -> GND and SWDIO -> SWDIO and +5 -> VDD pins must be connected together. If the circuit connected to the micro draws a small current, you can supply the IC power from the programmer itself.