IEEE 1149.7 also known as cJTAG

IEEE 1149.7 also known as cJTAG (compact JTAG) or dot7 is the latest addition to the family and emcopasses a wide range of additional features for accessing cores within SOCs, managing power of the test circuitry, improving data throughput rates etc.. External to the device two (out of six) compliance classes of ‘dot7’ include a reduce pin count interface that manipulates the regular (dot1) state machine with only TCK and TMS signals to transmit/receive instructions and data.

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