Milk-V Duo

Duo series

Revision history

Version	Date	Changes from previous version
0.1	2023/11/24	First version
0.2	2023/12/15	Introduction of Duo 256M and Related Products
0.3	2023/12/27	Introduction of Duo S and Related Products

Introduction

Milk-V Duo is an ultra-compact embedded development platform based on the CV1800B chip. It can run Linux and RTOS, providing a reliable, low-cost, and high-performance platform for professionals, industrial ODMs, AIoT enthusiasts, DIY hobbyists, and creators.

The Milk-V Duo 256M is an upgraded version of Duo with a memory boost to 256M, catering to applications demanding larger memory capacities. It features the SG2002 computing series chip, elevating computational power to 1.0TOPS@INT8. It enables seamless switching between RISC-V/ARM architectures and supports simultaneous operation of dual systems. Additionally, it includes an array of rich GPIO interfaces such as SPI, UART, suitable for a wide range of hardware development in edge intelligent monitoring, including IP cameras, smart peephole locks, visual doorbells, and more.

Milk-V Duo S is an upgraded model of Duo, featuring an upgraded SG2000 main controller with a larger 512MB memory and expanded IO capabilities. It integrates wireless capabilities with WI-FI 6/BT 5, and comes equipped with a USB 2.0 HOST interface and a 100Mbps Ethernet port for user convenience. Supporting dual cameras (2x MIPI CSI 2-lane) and MIPI video output (MIPI DSI 4-lane), it allows for versatile applications. The device also supports switching between RISC-V and ARM boot through a switch. With enhanced functionality, Duo S is better suited for a variety of scenarios with more complex project development requirements.

Specification

	Duo	Duo 256M	Duo S
Overview
SoC	CVITEK CV1800B	SG2002	SG2000
RISC-V CPU	C906@1Ghz + C906@700MHz	C906@1Ghz + C906@700MHz	C906@1Ghz + C906@700MHz
Arm CPU	N/A	1 x Cortex-A53@1GHz	1 x Cortex-A53@1GHz
MCU	8051@8KB SRAM	8051@6KB SRAM	8051@6KB SRAM
TPU	0.5TOPS@INT8	1Top@INT8	0.5Top@INT8
Storage	1 x microSD connector or 1x SD NAND on board	1 x microSD connector or 1x SD NAND on board	1 x microSD connector, 1x eMMC Pad on board
Memory	SIP DRAM 64MB	SIP DRAM 256MB	SIP DRAM 512MB
USB	1 x Type-C for power and data, USB Pads available	1 x Type-C for power and data, USB Pads available	1 x Type-C for power and data or 1x USB 2.0 A Port HOST
CSI	1 x 16P FPC connector (MIPI CSI 2-lane)	1 x 16P FPC connector (MIPI CSI 2-lane)	1x 16P FPC connector (MIPI CSI 2-lane),1x 15P FPC connector (MIPI CSI 2-lane)
Sensor Support	4M @ 25fps	5M @ 30fps	5M @ 30fps
Ethernet	100Mbps ethernet with PHY	100Mbps ethernet with PHY	100Mbps ethernet port(RJ45) onboard
Wireless	N/A	N/A	Optional WIFI6 / BT5.4 onboard
Audio	N/A	Via GPIO Pads	Via GPIO Header
Display	N/A	N/A	Via GPIO Header (MIPI DSI 4-lane)
GPIO	up to 26 Pins available for general purpose I/O（GPIO）	up to 26 Pins available for general purpose I/O（GPIO）	Up to 39x GPIO Pin (Via 2x 26Pin GPIO Header)
Power	5V/1A	5V/1A	5V/1A
OS Support	Buildroot, RTOS	Buildroot, RTOS	Buildroot, RTOS
Size	21mm*51mm	21mm*51mm	43mm x 43mm
Others	N/A	N/A	1x BOOT swich, 1x Recovery Key, 1x RST Key

Features

Processor

CV1800B (Duo)

1GHz and 700MHz RISC-V C906 processors
Integrated CVITEK TPU for smart detection.
SIP DRAM 64MB
Supports H.264/H.265 video encoding, up to 2880x1620@20fps.
Compatible with high-definition CMOS sensors.
Programmable frequency output for sensor clock.
Comprehensive ISP features for image optimization.
Partial OpenCV library support with CV hardware acceleration.
16-bit audio codec with built-in mic input and output functions.
Flexible network configurations with 1 Ethernet PHY.

SG2002 (Duo 256M)

1GHz and 700MHz RISC-V C906 processors
Optional T-Head C906@1GHz or Cortex-A53@1GHz
Integrated 1TOPS@INT8 TPU for smart detection.
SIP DRAM 256MB
Supports H.264/H.265 video encoding, up to 5M@30fps.
Compatible with high-definition CMOS sensors.
Support Multiple storage devices via SPI-NOR, SPI-NAND, eMMC5.0, 2 x SDIO3.0 interfaces
Comprehensive ISP features for image optimization.
Partial OpenCV library support with CV hardware acceleration.
16-bit audio codec with built-in mic input and output functions.
2L MIPI DSI 5M@30fps
4L or 2L+2L MIPI CSI 5M@30fps
Flexible network configurations with 1 Ethernet PHY.
QFN88

SG2000 (Duo S)

1GHz and 700MHz RISC-V C906 processors
Optional T-Head C906@1GHz or Cortex-A53@1GHz
Integrated 0.5TOPS@INT8 TPU for smart detection.
SIP DRAM 512MB
Supports H.264/H.265 video encoding, up to 5M@30fps.
Compatible with high-definition CMOS sensors.
Support Multiple storage devices via SPI-NOR, SPI-NAND, eMMC5.0, 2 x SDIO3.0 interfaces
Comprehensive ISP features for image optimization.
Partial OpenCV library support with CV hardware acceleration.
16-bit audio codec with built-in mic input and output functions.
2L MIPI DSI 5M@30fps
4L or 2L+2L MIPI CSI 5M@30fps
Flexible network configurations with 1 Ethernet PHY.
LFBGA

CSI-2 (MIPI serial camera)

Features a 16-pin FPC interface for 2-lane MIPI camera input.
Operates I2C, CLK, and RST signals at a 1.8V voltage level.

Ethernet

Milk-V Duo includes CV1800B chip with a 100Mbps PHY.
PHY is linked to a 5-pin solder pad.
External transformer and RJ45 socket are needed for Ethernet use.

USB

USB 2.0 compliant, backward compatible with USB 1.1.
Supports various speed modes, Host/Device functionality, and transfer protocols.
Expandable interfaces via USB Hub (up to 127 devices).
Power-saving mode, supports HID devices.
Functions as USB slave device with configurable software.
USB Type-C for storage media access.

Micro SD

SDIO0 is compatible with Secure Digital Memory (SD 3.0) protocol.

GPIO

Up to 26 GPIO pins on the MilkV-Duo 40-pin header provide access to internal peripherals such as SDIO, I2C, PWM, SPI, J-TAG, and UART.
Up to 3x I2C
Up to 5x UART
Up to 1x SDIO1
Up to 1x SPI
Up to 2x ADC
Up to 7x PWM
Up to 1x RUN
Up to 1x JTAG