HPMicro HPM64G0 – A 1 GHz RISC-V microcontroller


Yesterday, I ended up on the HPMicro website showing the illustration above about a 1 GHz MCU called HPM64G0. It looked interesting enough so I clicked on the link to a page with some documentation for the company’s HPM6700/6400 microcontrollers. But in typical Chinese fashion, I was asked for a mobile phone number to download the documents. No luck this time since a Chinese mobile phone number is required. If anybody can set up a mirror on Mega or other websites easily accessible outside of China that would be appreciated.

But eventually, I found an article in Chinese on EETrend where we can learn more about the HPM64G0 which happens to be a 1GHz microcontroller based on the RISC-V architecture. We already had one of those for Arm with the NXP i.MX RT1170, but I had yet to see any RISC-V microcontrollers clocked at such a high frequency.

1 GHz RISC-V Microcontroller

HPMicro HPM64G0 preliminary specifications and key features:

  • CPU Core
    • 32-bit RISC-V core (RV32-IMPAFDC) at up to 1 GHz with FPU and DSP
    • 32KB instruction/32KB data L1 cache, 256KB Instruction/256KB data L2 cache,
    • Coremark score of 5650, and 2950 DMIPS
  • GPU – 2D graphics engine
  • Memory – 2MB SRAM comprised of 1.5MB SRAM and 512KB zero-wait instruction and data local memory (ILM/DLM)
  • Display – RGB interface up to 1366×768 resolution @ 60 fps
  • Camera – Dual camera support
  • Networking – Dual Gigabit Ethernet with IEEE1588 (Precision Time Protocol – PTP) support
  • Other peripherals interfaces
    • 4 groups of 32-channel PWM with 2.5ns precision
    • Analog
      • 3x 12-bit ADC up to 5 Msps
      • 1x 16-bit ADC up to 2 Msps
      • 4x analog comparators
      • 29x analog input channels
  • Power management – Built-in DCDC converters and LDOs, an external PMIC is not needed
  • Power Consumption – 700mW at 1 GHz
  • Process – 40 nm

HPMicro says the HPM64G0 microcontroller targets consumer devices and Internet of Things applications, and it looks well suited for HMI with display support and a 2D graphics accelerator. There’s no information about development tools and software support, but the earlier HPMicro HPM6750EVKMINI evaluation board with an 800 MHz RISC-V MCU has some sample code for RT-Thread Studio and Segger Embedded Studio IDEs.

HPMicro HPM6750EVKMini 800MHz RISC-V development board
HPMicro HPM6750EVKMINI evaluation board with previous generation HPM6750 800 MHz RISC-V MCU

The article says that HPMicro HPM64G0 1 GHz RISC-V microcontroller is open for orders, but that samples will only be available starting from the end of February 2023.

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