Cmsemicon ANT32RV56xx is a RISC-V microcontroller for wireless charging

We’ve seen RISC-V architecture used in general-purpose microcontrollers, AIoT processors, as well as WiFi and Bluetooth IoT SoC’s such as ESP32-C3 and BL602. Allwinner is also prepping a RISC-V application processor, and we’ve covered plenty of other developments in our RISC-V 2020 highlights post.

But we’ve now been made aware of another application-specific RISC-V microcontroller from a Chinese fabless vendor I had never heard of. Meet Cmsemicon ANT32RV56xx RISC-V microcontroller for wireless charging applications.

Cmsemicon RISC-V wireless charging

Cmsemicon ANT32RV56xx “tentative” key features and specifications:

  • MCU Core –  RISC-V RV32EC core @ 48MHz
  • 32-bit hardware divider (HWDIV)
  • Memory – Up to 32KB ILM-SRAM, up to 8KB DLM-SRAM
  • Storage – 64KB program FLASH (APROM+BOOT), 1KB FLASH data area
  • Peripherals
    • Up to 46 I/Os
    • 6x Enhanced PWM (EPWM)
    • 1x I2C, 1x SPI/SSP, 2x UART
    • Up to 20x 12-bit ADC up to 100Ksps
    • Up to 20x 12-bit ADC up to 1.2 Msps
    • Capture/compare/pulse width modulation for up to 4-channel to connect to the hall sensor
    • Timers – System timer, watchdog timer (WDT), window watchdog timer (WWDT) 4x 32-/16-bit timers
  • RF – 2x programmable gain amplifiers, 2x operational amplifiers, 2x analog comparators
  • Debugging – JTAG
  • Misc – Built-in temperature sensor, 96-bit unique ID, 128-bit user ID
  • Supply Voltage – 2.1V~5.5V
  • Package – 48-pin LQFP
  • Safety certification – IEC60730 CLASS B standard

ANT32RV56xx package pinoutI found the information in the datasheet in Chinese, so there may be some errors in the specs. There’s no mention of supported wireless standard in the document, but a press release, again in Chinese, mentions the chip can handle  5W/7.5W/10W/15W wireless charging and can be used to create chargers compatible with QI V1.2.4, QC 2.0, Apple 7.5 W fast charge, Samsung 10W fast charge, and 15W EPP (Qi Extended Power Profile) fast charge.

Who is Cmsemicon?

The company website is, and LCSC describes the company as follows:

Cmsemicon is a leading MCU chip design manufacturer in China, with more than 10 downloads of single-chip production experience and self-owned brands CMS and SC, with a total of over 3 billion chip shipments. The company has successfully developed over 400 kinds of chip products, covering industrial control, medical electronics, motor control, household appliances, consumer electronics and other major fields.

More details about Cmsemicon ANT32RV56xx RISC-V wireless charging chip can be found on the product page.

Thanks to AnalogLamb for the tip.

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