Tool's documentation before you put devices into chain. Generally, JTAG supports many devices in single JTAG chain, but many tools are not compatible with this feature. FPGAs also use JTAG to download bit streams onto devices/memories, but these interfaces are more often called download cables. If your design uses multiple devices with JTAG TAP, you must either use separate connector for each device or chain devices. In other cases we recommend you using JTAG connector for manufacturer of your part orĪVR/Byteblaster JTAG (which is compatible with many other products) or standard 8pin "PLD" JTAG connector. If you are designing with ARM or MIPS microprocessor, we recommend using appropriate JTAG connector (EJTAG or ARM JTAG) to maintainĬompatibility with development tools.
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