Interface: SWD interface with four wires—VCC (3.3V), GND, SWDIO (TMS/DIO), SWCLK (TCK/CLK). Designed for integration on evaluation boards ("on-board"), hence the "OB" suffix. This ARM-OB debug probe features USB communication with a PC and connects to target devices via SWD for programming, simulation, and debugging. Supports SWD-compatible ARM-based microcontrollers, including ARM7, ARM9, ARM11, and Cortex-M0, M1, M2, M3, M4, A5, A8, A9 series. Compatible with MCUs from STMicroelectronics, NXP, Texas Instruments, Cypress, Microchip (Atmel), Analog Devices, Fujitsu, Toshiba, Silicon Labs (Energy Micro), and Nuvoton. Compared to J-Link OB and ST-Link V2, this debugger offers stable firmware with automatic upgrade capability and compact USB-drive-sized form factor. Color: Blue Material: Polycarbonate + metal Connection mode: SWD only Functions: - Programming: Flash ROM, EEPROM, and option byte (AFR) programming - Debugging: Full-speed execution, single-step debugging, breakpoint debugging, I/O status monitoring, and variable inspection - Performance: USB 2.0 interface; high-speed SWD programming and debugging with responsive operation Features: - Simplified SWD-only interface