Interface SWD interface four wires, VCC(=3.3V),GND,SWDIO(=TMS=DIO),SWCLK(=TCK=CLK) It is usually designed to be placed on the evaluation board (" on-board ") of major companies, which is why the suffix is "OB". This set of simulation download debugging device named "ARM-OB" has USB communication function, can communicate with PC, the other end through SWD or JTAG way to communicate with supported devices, to complete the debugging simulation download debugging task. Compared with the original OB debugger, our ARM OB simulation debugger lacks JTAG interface and only retains SWD interface, so as to debug and download the MCU of many companies using ARM kernel. Supported kernels. All with SWD interface ARM7911, Cortex-M0M1M2M3M4A5A8A9 and other embedded MCU series. Support MCU producer ST(Stmicroelectronics), Freecale(Freescale), Nuvoton (New Tang), NXP(NXP), TI(Texas Inst ents) Cypress, Atmel, Analog, Fujitsu, Toshiba. Energy Micro, etc. Comparison between J-Link OB and ST-Link V2. Comparison between the J-Link ARM OB and the ST-Link v2. the firmware is stable, can be automatically upgraded, there will be no firmware damage(full-function v8 has firmware problems). U disk size, convenient project is carried on business trips. color: blue Material: PCandmetal The connection method SWD mode Function and performance Programming function: can burn FLASH ROM, EEPROM, AFR, etc. Simulation function: Support full speed running single step debugging, breakpoint debugging and other debugging methods, can view IO status, variable data, etc. Programming performance: USB2.0 interface, SWD download, download speed! Simulation performance: USB2.0 interface for simulation debugging, single step debugging, breakpoint debugging, fast response speed! Product characteristics 1, simplified interface,using 4-wire SWD interface: vcc, swdio, swclk, gnd, can download simulation at high speed. 2, c