随笔分类 - JTAG
摘要：http://dangerousprototypes.com/docs/Bus_BlasterBus Blaster v2 is an experimental, high-speed JTAG debugger for ARM processors, FPGAs, CPLDs, flash, and more. Thanks to a reprogrammable buffer, a simple USB update makes Bus Blaster v2 compatible with many different JTAG debugger types in the most pop
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摘要：http://www.dzsc.com/data/html/2008-12-23/75397.htmlJTAG测试信号由下面5个信号组成。 TRST：测试复位输入信号，测试接口初始化 TCK：测试时钟，在TCK时钟的同步作用下，通过TDI和TDO引脚串行移入／移出数据或指令；同时，也为TAP（测试访问端口）控制器的状态机提供时钟。 TMS：测试模式选择信号，控制测试接口状态机的操作。 TDI：测试数据输入线，其串行输入数据至边界扫描寄存器或指令寄存器（由TAP控制器的当前状态及己保存在指令寄存器中的指令来控制）。 TDO：测试数据输出线，把从边界扫描链采样的数据传输至串行测试电路中的...
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摘要：http://www.freelabs.com/~whitis/electronics/jtag/One of the big issues in making a JTAG pod is level translation. The state of level translation ICs leaves a LOT to be desired. You would think that there would be a lot of chips that you could apply 1.2-5V power and logic on port A and 1.2-5V (or 0V)
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摘要：http://www.ethernut.de/en/hardware/turtelizer/Introducing Turtelizer 2OverviewTurtelizer 2 had been developed to provide JTAG Flash programming and debugging of ARM based boards via USB. Typical target boards areEthernut 3, theElektor Internet RadioorEthernut 5. However, as the hardware is based on
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摘要：http://debugmo.de/2012/02/xvcd-the-xilinx-virtual-cable-daemon/I recently discovered an almost undocumented function in Xilinx ISE: the Xilinx virtual cable driver. It’s basically “a platform cable without a platform cable” (asmarcansaid so nicely) – it allows you use Impact (and Chipscope, and all
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摘要：http://www.freelabs.com/~whitis/electronics/jtag/Each JTAG enabled chip has a TAP controller with a state machine with 16 states.The state of the TMS pin at each TCK pulse dictates the transitions between states. These states help control whether you are shifting through the instruction register or
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摘要：http://www.jtagtest.com/pinouts/PinoutsARM-20(used with almost all ARM-based microcontrollers)ARM-14(used as a lower pin-count version of ARM-20)MIPS EJTAGused with all MIPS microcontrollers (mostly embedded devices, can be found on many WiFi devices)Toshiba MIPSPhilips MIPSAVR JTAGCompatible with A
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