Definition and Meaning of JTAG Interface Pins

Definition and Meaning of JTAG Interface Pins

JTAG interfaces come in 10-pin, 14-pin, and 20-pin configurations. Although the number of pins and their arrangement differ, some pins are common across these configurations. The definitions of each pin are as follows: 1. Pin Definitions Test Clock Input (TCK) —– Required 1 TCK is mandated by the IEEE 1149.1 standard. TCK provides an independent, … Read more