Forlinx FET3506J-S system-on-module (SoM) is based on a Rockchip RK3506J SoC, the industrial version of the RK3506 tri-core Cortex-A7 SoC, designed for smart industrial applications, and operating at a low power consumption of about 0.7 Watts.
The Rockchip RK3506 SoC was first unveiled in 2023 through a product roadmap. However, we only spotted it in a product at the very end of 2024 with the Luckfox Lyra and Luckfox Lyra Plus featuring a MIPI CSI display connector and optional Ethernet. The Forlinkx FET3506J-S CPU module is the first platform with the industrial version (RK3506J), and the company also provides the OK3506 carrier board/development board for evaluation.
Forlinx FET3506J-S system-on-module
Specifications:
- SoC – Rockchip RK3506J
- CPU
- 3x Arm Cortex-A7 core up to 1.5 GHz or 1.6 GHz (depending on where one looks in the documentation)
- Arm Cortex-M0 real-time core
- GPU – 2D GPU only
- No VPU, no NPU
- CPU
- System Memory – 256MB, 512MB, or 1GB DDR3
- Storage
- 256MB NAND Flash or
- 8GB eMMC flash
- I/Os via 146 castellated holes with 1mm pitch
- Storage
- 4-bit SDIO (only available if eMMC flash is not soldered)
- FSPI (only available in NAND flash is not soldered)
- Display
- Optional 2-lane MIPI DSI
- Optional 24-bit RGB LCD interface with resolution up to 1280×1280 @ 60Hz; note multiplexed with FLEXBUS and DSMC interfaces
- FLEXBUS parallel interface for high-speed I/Os
- DSMC data bus for PSRAM and FPGA communication. (8-bit/16-bit master mode, 8-bit slave mode)
- Audio
- 4x SAI (2x 1-lane Tx/1-lane Rx, 1x 4-lane TX/1-lane Tx, 1x 1-Lane Tx/4-lane Rx)
- 4ch PDM
- SPDIF TX/RX
- Audio ADC
- 2x Audio DSM
- Networking – 2x 10/100Mbps Ethernet (RMII)
- USB – 2x USB 2.0 including one supporting OTG
- Other I/Os
- 2x CAN 2.0 / CAN-FD interfaces
- 3x SPI, up to 6x UART (UART0 serves as debug port), 3x I2C up to 1 MbpsFSPI
- Up to 11x PWM
- Analog – 10-bit SARADC up to 1MS/s; input voltage range: 0 to 1.8V
- Up to 8x touch key interfaces
- Up to 76x GPIOs (70x GPI, 76x GPO)
- Debugging – JTAG
- Storage
- Supply Voltage – 5V DC
- Dimensions – 44 x 35mm
- Temperature Range – -40°C to +85°C
Forlinx Embedded provides a Linux 6.1 BSP with support for LVGL 9.2, AMP architecture, and Linux RT, as well as the OK3506J-S carrier board which we will describe below.
OK3506J-S carrier board
Specifications:
- SoM – Forlinx FET3506J-S as described above
- Storage – MicroSD card slot (only working with the NAND flash version of the module)
- Display Interface
- 2-lane MIPI DSI connector
- 24-bit RGB LCD connector supporting up to 1280×1280 @ 60Hz.
- Only one display supported
- Audio
- 3.5mm audio jack with stereo audio and microphone
- Onboard microphone
- Networking
- 2x 10/100Mbps Fast Ethernet RJ45 ports
- Wi-Fi 4 & Bluetooth 4.0 module via Realtek RTL8723DU (USB 2.0) module and SMA antenna connector
- Optional 4G LTE module via mini PCIe (USB 2.0) socket, Nano SIM card socket, and SMA antenna connector
- USB
- USB Type-C port
- 2x USB 2.0 Type-A ports
- Serial via terminal block
- 2x CAN Bus and CAN-FD with isolation and protection.
- RS485 with isolation and protection
- Expansion – DSMC header
- Debugging
- USB to serial converter via USB Type-C port
- JTAG via header
- Misc
- Power on/off switch
- 6x buttons for Reset , Maskrom, VOL+, VOL-, MENU, and ESC
- Onboard RTC chip and coin-cell battery holder.
- Power Supply – 12V DC jack
- Dimensions – TBD
Forlinx will not usually provide price information for their CPU modules and development boards, and the FET3506J-S CPU module and OK3506J-S carrier board are no different. A few more details may be found on the product page and the press release.
Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.
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