本人自己制作的JTAG下载线，只用了一片244,可以支持ARM9、Cortex™ -M3、CPLD、FPGA、89S52等。目前这些已经测试通过。性能稳定。但是注意74LS244和74HC244在性能上可能会有些区别-I own the JTAG download cable, only a 244, can support the ARM9, Cortex
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