Allwinner D1s/F133 RISC-V processor integrates 64MB DDR2

Allwinner D1s (aka F133) is a cost-down version of Allwinner D1 RISC-V processor introduced earlier this year together with a Linux capable development board, with the main difference being the integrated 64MB DDR2.

Besides the built-in RAM, Allwinner D1s comes with many of the same features as D1 RISC-V SoC, but loses HDMI output and the HiFi 4 audio DSP, and Allwinner made some tweaks to the IOs with one less I2S audio interface, and general-purpose ADC.

Allwinner D1s / F133 Block Diagram

Allwinner D1s/F133 specifications:

  • CPU – RISC core with 32 KB I-cache + 32 KB D-cache (CNXSoft: not specified, but probably the same Alibaba/T-Head Xuantie C906 RISC-V core as used in Allwinner D1)
  • DSP – HiFi4 DSP 600MHz with 32 KB I-cache + 32 KB D-cache, 64 KB I-ram + 64 KB D-ram
  • Memory – 64 MB DDR2 (SIP)
  • Storage I/F – SD3.0, eMMC 5.0, SPI Nor/Nand Flash
  • Video Engine
    • Video decoding
      • H.265 up to 1080p @ 60fps, or 4K @ 30fps
      • H.264 up to 1080p @ 60fps, or 4K @ 24fps
      • MPEG-1/2/4, JPEG, VC1 up to 1080p @ 60fps
    • Video encoding – JPEG/MJPEG up to 1080p @ 60fps
    • Supports input picture scaler up/down
  • Video OUT
    • RGB LCD output interface up to 1920 x 1080 @ 60fps
    • Dual-link LVDS interface up to 1920 x 1080 @ 60fps
    • 4-lane MIPI DSI interface up to 1920 x 1080 @ 60fps (Note: shown in block diagram, but not in the specs)
    • HDMI V1.4 output interface up to [email protected]
    • CVBS OUT interface, supporting NTSC and PAL format
  • Video IN
    • 8-bit parallel CSI interface
    • CVBS IN interface, supporting NTSC and PAL format (only for F133-B processor)
  • Display Engine – Allwinner SmartColor 2.0 post-processing engine, de-interlace support, G2D hardware accelerator
  • Audio
    • 2x DAC’s and 3x ADC’s
    • Analog audio interfaces – MICIN3P/N, LINEINL/R, FMINL/R, HPOUTL/R
    • Digital audio interfaces – I2S/PCM, DMIC, OWA IN/OUT
  • Networking – 10/100/1000M EMAC with RMII and RGMII interfaces
  • USB – USB2.0 OTG, USB2.0 Host
  • Other peripherals
    • SDIO 3.0, SPI x 2, UART x 6, TWI x 4
    • PWM (8-ch), GPADC (1-ch), LRADC (1-ch), TPADC (4-ch), IR TX & RX
  • Security Subsystem
    • AES, DES, 3DES encryption and decryption algorithms
    • RSA signature verification algorithm
    • MD5/SHA and HMAC tamper-proofing
    • Hardware random number generator
    • Integrated 2 Kbits OTP storage space
  • Package – eQFPA 128 14×14 mm
  • Manufacturing process – 22nm

The processor page on Allwinner’s website does not mention RISC-V at all, only RISC, but I found about the processor via the MangoPi team who teased us with the upcoming MangoPi-MQ1 SBC based on Allwinner F133-A processor, so I can confirm it’s indeed a RISC-V processor.

Allwinner F133-A SBC
MangoPi MQ1 board

For further confirmation, the xfel FEL tool for Allwinner D1 on Github also supports F133. Supported operating systems include Melis RTOS based on RT-Thread, and Tina Linux (OpenWrt).

xfel Allwinner RISC-V FEL tool

Allwinner D1s looks to be designed for cameras and smart displays and offers peripherals, embedded RAM just like Allwinner V3s or SigmaStar SSD210 Arm-based processors. Boards based on Allwinner D1s/F133 should be very cost-effective with Linux-capable RISC-V SBCs likely to sell for $10+ and up. We’ll know soon, as MangoPi-MQ1 mass production is scheduled for November, and the board should start selling on Taobao and Seeed Studio soon after.

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