Sipeed Longan Nano v1.1 is an updated development board based on the GD32VF103CBT6 MCU chip which has built-in 128KB Flash, 32KB SRAM. It is convenient for students, engineers, and geek enthusiasts to tinker with the new-generation RISC-V processors. GD32VF103CBT6 is a Bumblebee core, based on Nuclei System Technology supporting RV32IMAC instruction set and ECLIC fast interrupt function. Meanwhile, it costs only 1/3 of that of traditional Cortex-M3.

There can be multiple timer modules on the given device, e.g., four general-purpose 16-bit timers, two basic 16-bit timers, and one advanced 16-bit timer. More specifically, it has a watchdog timer to monitor the main program, an RTC(Real-time clock) to provide stable clock signals, and a SysTick(System tick timer) to maintain the main system working.

Longan Nano v1.1 development board has 28 GPIOs connected to the row pins which is so convenient that it can support connecting lots of devices. And it can be reset anytime by the Reset Button and the BOOT button. 160x80 RGB IPS LCD can be connected to its SPI screen interface. Also, it has an on-board 8M passive crystal oscillator, 32.768 kHz RTC low-speed crystal oscillator, TF Card Holder, 1 RGB LED, and uses a Type-C USB interface. 

Longan Nano v1.1 supports multiple download methods, e.g., USB DFU download, UART ISP download, and JTAG download. By USB DFU download mode, you only need a USB Type-C cable to download the program to the development board. Longan Nano v1.1 supports the standard JTAG interface, which means it can debug online using the in-store RISC-V debugger or any JTAG-enabled debugger such as J-Link.

Features:

• Chip built-in 128KB Flash, 32KB SRAM
• 4 x general purpose 16-bit timer, 2 x basic 16-bit timer, 1 x advanced 16-bit timer
• Watchdog, RTC, SysTick
• 3 x USART, 2 x I2C, 3 x SPI, 2 x I2S, 2 x CAN, 1 x USBFS (OTG)
• 2 x ADC (10 channel), 2 x DAC

Specifications:

• CPU: GD32VF103CBT6 based on RISC-V 32-bit core
• Kernel power consumption: Only 1/3 of the traditional Cortex-M3
• Storage: 128KB Flash, 32KB SRAM
• Peripheral:
• 4 x general-purpose 16-bit timer, 2 x basic 16-bit timer, 1 x advanced 16-bit timer
• Watchdog, RTC, Systick
• 3x USART, 2 x I2C, 3 x SPI, 2 x I2S, 2 x CAN, 1 x USBFS (OTG), 2 x ADC (10 channel), 2 x DAC
• Button: 1 Reset Button and 1 BOOT button（Connected to GPIO）
• Screen interface: SPI interface （160x80 RGB IPS LCD can be connected）
• Storage interface: Onboard TF Card Holder
• Debug interface: 2x4 pin leads out JTAG debugging interface and serial port
• Crystal oscillator: 8MHz passive crystal oscillator + 32.768KHz RTC crystal oscillator
• LED: Onboard 1 RGB LED
• GPIO: 28 GPIOs have been connected to the row pins
• Software:
• IDE: PlatformIO IDE, Support debugging, Arduino
• Compile Toolchain & Debugger: GCC, OpenOCD
• Operating system: RT-Thread, LiteOS
• Working Conditions:
• External power supply: TYPE-C: 5V±10% 0.5A
• Temperature rise: <30K
• Operating ambient temperature range: -10℃ ~ 65℃

Applications:

• Robot
• Smart Timer
• Smart Meteorograph

Package Includes:

• 1 x Sipeed Longan Nano v1.1 Development Board 
• 1 x 0.96inch 160x80 IPS RGB LCD