Jtag最新协议 2001年颁布的。 Circuitry that may be built into an integrated circuit to assist in the test, maintenance, and support of assembled printed circuit boards is defined. The circuitry includes a standard interface through which instructions and test
JTAG协议规范1149.1和1149.7，cjtag，可参考内容。 IEEE 1149.7 is a standard for a test access port and associated architecture that offers reduced pins and enhanced functionality
