OK3399K-C Single Board Computer

CPU: Rockchip RK3399K

Architecture: 2x Cortex-A72 + 4x Cortex-A53

Frequency: [email protected][email protected]


ROM: 16GB / 32GB eMMC

System: Linux4.4.189,Android7.1,ForlinxDesktop 18.04

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Single Board Computer OK3399K-C based on Rockchip RK3399K

OK3399K-C single board computer (SBC) can serve as a development platform for both evaluation and application development purpose. The kits provide a great showcase of the Rockchip RK3399K SoM connectivity features and performances. It's integrated with GPU Mali-T864, can support OpenGL ES1.1/ 2.0/ 3.0/ 3.1, OpenVG1.1, OpenCL and DX11. It has on-board 2GB LPDDR3 RAM and 16GB eMMC. A variety of display interfaces such as HDMI2.0, MIPI-DSI, eDP1.3 and DP1.2 are all available and resolution up to 4K. Dual-screen both synchronous and asynchronous playing are well supported. Besides, it carries PCIe, USB3.0 Host, Type-C, MIPI-CSI, SPDIF, IIC, SPI, UART, ADC, PWM, GPIO, IIS(8 digital micphone array input) and Ethernet on board.

Hardware and software customization options are available to ensure that the OK3399K-C SBC is ready the moment you open the box. The OK3399K-C comes with Android 7.1 and can be customized at the factory to suit your needs. Provide more customization options to help reduce turnaround times, speed development, and ensure rapid deployment. Forlinx will work directly with you to ensure that your requirements are met.

Target application

Self-service terminal

Edge computing

5G Smart terminal

POS machine

Facial recognition

…… ……

High-speed connectors, OSP and misplug-proof designing

SoM can be mounted to carrier board via four 80-pin ultra thin connectors with strong OSP performance,
which guarantees high signal transaction reliability and protects contacts from touching and stain;
Misplug-proof deisigning to avoid SoM failure by misplug operation.

RK3399K motherboard PC
RK3399K motherboard Phone

OK3399K-C SBC Interface Display

Powerful and various communication channels

OK3399K-C has on-board Gigabit Ethernet interface, can support 2.4GHz & 5GHz WiFi, BT5.0, and also it's preserved with mini PCIe package for 4G LTE.

RK3399K network
RK3399K network

Easy for evaluation and development

All pins except standard peripherals are all drawn out by pin connectors with pitch of 2.54mm, including SPIx 2, IIC,
ADCx 2, GPIOx 4. 2 USB2.0 Host are expanded by XH2.54 connectors which can be mounted with binocular camera or be used for serial expansion.

RK3399K evaluation board pc
RK3399K evaluation board phone

Easy for installation

OK3399K-C is available with 2 structures with dimension difference. 130x 155mm and 130x 140mm, the
former one can fit a stardard aluminum enlcosure and the later compact one for user-defined enclosure.

OK3399K-C sbc dimension
OK3399K-C sbc dimension

▊ Product Video

OK3399-C SBC Demo | Rockchip RK3399 processor based

▊ RK3399K System on Module Hardware Features


RK3399 hexa-core, Big.Little architecture
Cortex-A72 Core:
• 2x Cortex-A72
• up to 1.8GHz
• 64-bit Armv8
Cortex-A53 Core:
• 4x Cortex-A53
• up to 1.4GHz
• 64-bit Armv8


3D graphical engine:
• quad-core Mali-T860MP4
• can support OpenGL ES1.1/2.0/3.0/3.1
• can support OpenCL 1.2

2D graphical engine:
• source form:
ARGB, RGB888, RGB565, RGB4444, RGB5551, YUV420, YUV422(SupportYUV422SP10bit/YUV420SP10bit)
• target form:
ARGB, RGB888, RGB565, RGB4444, RGB5551, YUV420, YUV422(SupportYVYU422/420 output)

• maximum resolution: source 8192x8192, and target 4096x4096


• H.265/HEVC, up to 4Kx2K @ 60fps
• VP9, up to 4Kx2K @ 60fps
• H.264/AVC, up to 4Kx2K @ 30fps
• MPEG-1,ISO/IEC 11172-2, up to1080P @ 60fps
• MPEG-2,ISO/IEC 13818-2, up to 1080P @ 60fps
• MPEG-4,ISO/IEC 14496-2, up to 1080P @ 60fps
• VC-1, up to 1080P @ 60fps
• MVC based on H.264 or H.265, up to 1080P @ 60fps

• 1080p30 AVC/H.264
• 1080p30 VP8


• 2GB(optional 4GB)
• LPDDR3 1600


• 16GB(optional 32GB)

• eMMC 5.1 storage
• HS400 mode

Working Temperature



46mm x 70mm

Voltage Input



• Android: 7.1 64bit
• Kernel: Linux 4.4
• Development environment: provide a well-built development environment

• File System: buildroot
• Desktop: Weston
• Kernel: Linux 4.4.189
• Development environment: provide a well-built development environment

• File System: Ubuntu18.04 64bit
• Kernel: Linux 4.4.189
• Development environment: provide a well-built development environment
• Description: ForlinxDesktop18.04 is built on Ubuntu18.04 64bit desktop system and is a desktop system for FET3399K-C SoM and OK3399K-C SBC.




dual-screen engine up to 4096x 2160 and 2560x 1600, can output from below ports:

• CPU has 3 built-in MIPI PHY, MIPI0 can be only used as DSI, MIPI1 can be used as DSI or CSI, MIPI2 can be only used as CSI

• each DSI port has 4 data lanes, can support data transferring rate up to 6.0Gbps

• each DSI port can support output up to 1080P@ 60FPS

• MIPI0 and MIPI1 combination can support output 2560x 1600@ 60FPS

• eDP V1.3

• RGB 6/ 8/ 10-bit

• 4 data lanes, each 2.7/ 1.62Gbps

• can support PSR

DP x1
• Display Port V1.2

• compatible with HDCP2.2(backward compatible with HDCP1.3)

• only has one built-in DP controller, can output from Type-C*

• support outputting up to 4Kx 2K@ 60Hz

• HDMI1.4, HDMI2.0

• up to 18Gbps port trunks

• up to 180P@ 120Hz, 4Kx 2K@ 60Hz, QXGA@ 120Hz

• HDCP1.4/ 2.2


I2S/PCM x3
• I2S0/I2S2 can support 8-channel TX/RX. I2S1 can support -channel TX/RX
• IIS2 internally connected to HDMI and DisplayPort, IIS0 and IIS1 are for peripherals
• audio resolution from 16-bit to 32-bit
• sampling rate up to 192KHz
• can support two 16-bit audio data stored in one 32-bit width location
• can support two-phase formed stereo audio output
• can support 16-bit to 31-bit audio data left or right justified in 32-bit width sampling data frame zone
• can support 16-bit, 20-bit, 24-bit audio data transferring in PCM mode
• can support none-PCM mode


• can support one 13.0MP camera or two 8.0MP cameras
• two internal ISP
• one ISP with resolution up to 14.0 MP
• USB UVC camera input


• USB Type-C x2(multiplexed with USB 3.0)
• USB Type-C 1.1
• can support USB3.0 Type-C and DP 1.2* can switch to USB Type-C mode
• USB3.0 up to 5Gbps
• DP1.2 up to 5.4Gbps(HBR2), can support 1/2/4 mode*
• DisplayPort with AUX channel*


• USB OTG 3.0 x2( contains USB OTG 2.0 x2)
• compatible protocol: USB 3.0, USB 2.0, USB Host 1.1
• USB 3.0 in full-duplex mode up to 5Gbps band width

USB 2.0

• USB 2.0 Host x2(separated, not multiplexed with 3.0)
• compatible with USB 2.0
• can support high speed mode(480Mbps), full speed mode (12Mbps) and low speed mode(1.5Mbps)


• SD/MMC x2
• can be configured to SD/MMC or SDIO
• compatible with SDIO 3.0
• 4-bit data bus


• Gigabit Ethernet x1
• RGMII is available for 10/100/1000-Mbps
• RMII is available for 10/100-Mbps


• SPI x5
• can support serial host and slave mode, software configurable
• operation based on DMA or interrupt
• TX and RX are 32x16-bit FIFO


• UART x5
• operation based on DMA or interrupt
• TX and RX are 64Bytes FIFO
• each serial up to 4.0 Mbps


• I2C x7
• multi-host machine I2C
• standard mode up to 100 kbit/s
• fast mode up to 400 kbit/s


• PCIe x 1
• compatible with PCI Express revised 2.1
• 4 full-plex channel
• each channel can support 2.5GT/s to each direction
• dual-operation mode: Root Complex(RC) and End Point(EP)


• PWMs x3
• operation based on interrupt
• 32-bit timer/ counter
• can support capture mode
• can support continuous mode or one-time mode


• ADC x5
• successive approaching ADC
• 10-bit
• switch rate up to 1MS/ s for sampling

▊ RK3399K Single Board Computer Hardware Features

Functional Interface


Power In DC12V

• HDMI1.4, HDMI2.0

• up to 18Gbps port trunks

• up to 180P@ 120Hz, 4Kx 2K@ 60Hz, QXGA@ 120Hz

• HDCP1.4/ 2.2

USB Type-C

• install or update system by USB type-C
• USB Type-C 1.1
• can support mode switching between USB Type-C and DP1.2*
• USB3.0 transferring rate up to 5Gbps
• DP1.2 transferring rate up to 5.4Gbps(HBR2), can support 1/ 2/ 4 mode*
• DisplayPort can support AUX channel*

TF Card

• install or update system by TF card
• can support 1.8V* and 3.3V mode


• protocol: USB3.0, USB2.0, USB Host 1.1
• USB full-duplex mode transferring rate up to 5Gbps

USB 2.0

• USB 2.0 Host x4, USB 2.0 Host Type-A x 2
• expandable by HUB which is same with 4G and P28

• USB 2.0 Host XH2.54 x 2
• P29 is a native USB

• P28 is expanded by HUB

IO Expand

SPI x2
• Support for serial master-to-master mode, software configurable
• DMA-based or interrupt-based operations
• TX and RX are 32x16-bit FIFO, respectively

• The Android system defaults to GPS
• Reuse with SPI1

I2C x1
• Multi-host I2C
• The transmission rate of up to 100 kbit/s in standard mode
• Transfer rate of up to 400 kbit/s in fast mode

ADC x2
• One-on-one approximation ADC
• 10 bits
• The conversion speed range can be up to 1MS/s sample rate

• 1.8V level


• Mini PCIe package


• Micro USB connector

• on-board USB to serial chip(CP2102)


• 10/100/1000-Mbps auto-negotiation, RJ 45 connector


• can support 1x 13MP or 2x 8.0MP


• it's configured to audio volume adjusting keys in Android system
• VoL+ is a Recover key, press it to start OTG flashing mode

3.5mm Earphone

• can support MIC and Headphone
• CTIA standard and can support earphone line controlling


• output consumption rate up to 1W
• can support D-amplifier output


• IEEE 802.11b/g/n & Wi-Fi AP 2.4GHz
• IEEE 802.11a/n/ac & Wi-Fi AP 5GHz
• SDIO3.0@ WiFi

• BT5.0


• can support slave mode and slave mode


• eDP v1.3
• 4 data lanes, each 2.7/ 1.62 Gbps
• supported with a 12V power interface, backlight enabled and backlight adjusted by PWM

MIPI-DSI • 4 data lanes, each 6.0 Gbps
• each up to 1080P@ 60FPS

• PCIe x 4 full-duplex

• each channel serial data transferring rate up to 2.5GT/ S to each direction

• M.2 KEY M connector

• preserved with 2260 and 2280 mounting holes for M.2 device

• can support NVMe static hard disk

▊ Evaluation Kit

  • 1x FET3399K-C core board;
  • 1x OK3399K-C carrier board;
  • 1x WIFI antenna (2.4G&5G dual-band, gain 5dB, SMA interface, length 19.5cm);
  • 1x heat sink 38*38*10mm;
  • 1x Anti-static bag (17*28cm).

Kits Pack

  • 1x data cable (USB to micro interface, 1.2m long, black);
  • 1x warranty card;
  • 1x power adapter (XED-SN2013S, 5.5*2.1mm, AC220V, DC12V, 2A);
  • 1x packing box (235*195*95mm).

▊ Accessories

Please click here to get more information about the supported modules and accessories.

Technical Support

Forlinx provides software resources including kernel and driver source code, together with detailed user manual, schematic documentations to help customer start their development rapidly.

Forlinx provides embedded hardware reference manual, embedded software reference manual, including Rockchip RK3399 embedded software Android system reference manual, and Linux system reference manual.

For more details on solution design with RK3399/RK3399K SBC

Contact Us

Welcome to get in touch with us, our experts will reply to your email within 24 hours.


▊ How To Buy

1. Order Online

We have an online store on Alibaba, please contact us for details.

2. Order Offline

Please send your inquiry to [email protected];

3. Payment Terms

100% T/T in advance.

▊ Shipment

1. Delivery: Goods will be shipped by express upon the receipt of the payment;

2. Lead time: Goods will be shipped out within five working days for sample orders and 6 weeks for bulk orders;

3. Shipping charge: Buyers should bear the shipping cost.

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