W801 RISC-V WiFi/BLE combo from Winner Micro


W801 is a WiFi/BLE IoT SoC manufactured by Winner Micro, which is based in Beijing, China. It has rich on-chip peripherals. The key features are:

  • 2.4GHz IEEE802.11b/g/n 
  • Bluetooth/BLE 4.2 dual mode
  • Integrated 32bit C-Sky V2 core
  • General Purpose IO: GPIO/ADC
  • Rich communication interfaces: UART/SPI/I2C
  • Special interface: I2S/7816/SDIO
  • UI interface: LCD/Touch sensor
  • Memory interface: PSRAM
  • Security module: TEE with hardware encryption algorithms
  • Built-in DSP
  • Built-in FPU
  • Code protection
  • 2MB XIP flash memory with code encryption, signature, secure debug, secure OTA
  • GCC support
PS: C-Sky V1 was M-core from Motorola semiconductors, and C-Sky V2 was upgraded and revised.

Assessment:
  • XIP flash may have some restriction on execution speed and power consumptions.
  • Some time critial code has to run in the RAM
  • ADC precision is low and sampling rate is low.
  • Lack of documentations and supports, although it is quite cheap.
  • A complete SDK/toolchain is ready for OSHW community, but it is helpful for small modificaitons for application development.
  • Recommended for DIYer for small projects.

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