Zephyr Real-Time Operating System Documentation

The STM32U5G9J-DK1 Discovery kit is a development platform based on the STM32U5G9NJH6Q microcontroller (Arm® Cortex®-M33 with Arm® TrustZone®). It features 3 MB SRAM, 4 MB flash, and high-performance graphics support via 2.5D NeoChrom, Chrom-ART, and Chrom-GRC™ accelerators.

Key hardware includes:

• 2.47-inch RGB 480x480 TFT round LCD with MIPI DSI® and capacitive touch.
• USB Type-C® HS, Octo-SPI flash, Hexadeca-SPI PSRAM, and eMMC flash.
• Time-of-Flight and gesture detection sensors.
• Integrated ST-LINK/V3E debugger/programmer with a USB Virtual COM port bridge.

The ESP32-C3-DevKit-RUST is a development board based on the ESP32-C3 RISC-V single-core SoC.

Key Hardware Features:

• SoC: ESP32-C3 (Wi-Fi and Bluetooth 5 LE).
• Module: Includes an ESP32-C3-MINI-1 module.
• Sensors: 6DoF IMU (ICM-42670-P) and a temperature/humidity sensor (SHTC3).
• Power: USB Type-C (note: no Power Delivery/PD compatibility) and a Li-Ion battery charger.
• Peripherals: WS2812 LED and a user LED.

The EFM32PG23 Pearl Gecko Board (pg23_pk2504a) is a development kit based on the EFM32PG23 SoC, featuring an ARM Cortex®-M33 processor.

Key Hardware Specifications:

• CPU: ARM Cortex®-M33
• Flash: 512 kB
• RAM: 64 kB
• On-board Debugger: SEGGER J-Link
• Peripherals: USB connectivity, Advanced Energy Monitor (AEM), 4x10 segment LCD, Si7021 Relative Humidity and Temperature Sensor, and an inductive LC sensor.
• Expansion: 20-pin 2.54 mm header and breakout pads for I/O access.
• Power: USB or CR2032 coin cell battery.

The Adafruit KB2040 is a versatile, low-cost board based on the RP2040 SoC.

Key Hardware Specifications:

• Processor: Dual-core Arm Cortex-M0+ (up to 133MHz)
• Memory: 264KB SRAM, 8MB on-board QSPI flash (XIP capable)
• GPIO: 18 pins, 4 Analog inputs, 16 PWM channels
• Peripherals: 1 UART, 1 SPI, 2 I2C (one via STEMMA QT), 8 PIO (Programmable I/O), USB 1.1 (host/device)
• On-board features: RGB Neopixel, USB connector, STEMMA QT connector, and a Watchdog timer.

The xmc47_relax_kit (KIT_XMC47_RELAX_V1) is an evaluation kit based on the XMC 4700 family. It features an Arm Cortex-M4 core running at up to 144 MHz.

Key Hardware Specifications:

• SoC: XMC 4700 (LQFP144)
• CPU: Arm Cortex-M4 @ 144 MHz
• Memory: 2048 KB Flash, 352 KB SRAM
• Connectivity: Ethernet, CAN, 32-Mb QSPI flash, microSD card slot
• Debug: Detachable SEGGER J-Link debugger (supports SWD, SWO, and UART VCOM)
• Expansion: Arduino-compatible headers (3.3V) and two 80-pin headers (x1, x2)
• Power: USB powered (3.3V operating) via Micro-USB connector

ElemRV-N is an open-source RISC-V microcontroller designed using SpinalHDL. The currently supported silicon version is ElemRV-N 0.2, fabricated using a 130nm open semiconductor process.

Key Specifications:

• CPU: VexRiscv RISC-V core with a 5-stage pipeline.
• ISA Extensions: RV32IMC_Zicntr_Zicsr_Zifencei (includes Integer Multiply/Divide, Compressed Instructions, Base Counter/Timer, CSR operations, and Instruction-fetch fence).
• System Clock: 20 MHz (configured via the clock-frequency property in the cpu0 devicetree node).
• Interrupts: Each core features a Hart-Level Interrupt Controller (HLIC) configurable via CSRs.
• Timer: RISC-V compliant machine timer enabled by default.
• GPIO: 12 individual pins with tri-state capabilities (configurable as input or output).

The Renesas FPB-RA6E1 is a fast prototyping board based on the RA6E1 MCU, which features a 200MHz Arm® Cortex®-M33 core with TrustZone®. It is designed for entry-level IoT applications requiring high performance and connectivity (such as Ethernet).

Key Hardware Features:

• MCU: RA6E1 (100-pin LQFP package).
• Debug/Programming: Built-in SEGGER J-Link Emulator (SWD) via USB.
• Expansion: Supports Arduino (Uno R3) connectors and Digilent Pmod™ (SPI, UART) connectors (not fitted).
• User Interface: Includes user LEDs (green), a debug/power LED (yellow), one user button, and one reset button.
• Power: Two 5V input sources available.

The Seeed Studio XIAO ESP32S3 and XIAO ESP32S3 Sense are IoT mini development boards based on the Espressif ESP32-S3 SoC.

Key Hardware Features:

• SoC: ESP32-S3 with dual-core Xtensa® 32-bit LX7 microprocessor.
• Connectivity: Integrated 2.4 GHz Wi-Fi and Bluetooth® Low Energy (BLE).
• Memory: 8MB of flash.
• Interfaces: USB-C port for programming and debugging, integrated battery charging, and an U.FL external antenna connector.
• Form Factor: Standard XIAO 14-pin pinout.

Sense Variant Differences: The XIAO ESP32S3 Sense includes additional hardware:

• OV2640 camera sensor
• Microphone
• SD card slot

The LPCXpresso55S06 is an evaluation platform for the LPC55S0x/LPC550x MCU family, based on the Arm® Cortex®-M33 architecture.

Key Hardware Specifications:

• MCU: LPC55S06 Arm® Cortex®-M33 (up to 96 MHz).
• Memory: 256 KB flash and 96 KB SRAM on-chip.
• Debug Probe: Integrated LPC-Link2 debug high-speed USB probe with VCOM port.
• Expansion: Arduino UNO compatible shield connectors, PMod/host interface, and MikroElektronika Click module site.
• Peripherals: Tri-color LED, CAN Transceiver, NXP FXOS8700CQ accelerometer, and UART header.
• Clock: Configured to use the internal FRO at 96MHz as the system clock source.

The ucans32k1sic is a CAN signal improvement capability (SIC) evaluation board designed for automotive and industrial applications. It is based on the NXP S32K146 (Arm Cortex-M4F @ up to 112 MHz) microcontroller, featuring 1 MB Flash and 128 KB SRAM.

Key hardware features include:

• Two CAN SIC interfaces with dual CAN FD PHYs.
• DCD-LZ debug interface supporting SWD and Console/UART.
• One user RGB LED and one user button.
• JST-GH DroneCode compliant connectors.
• System clock is configured to 80 MHz in RUN mode.