JTAG chain Definition

One or more devices through which programming and/or configuration data are passed from device to device via the Joint Test Action Group (JTAG) Boundary-Scan Test (BST) circuitry. A JTAG chain can consist of only one device.

In JTAG mode, the Intel® Quartus® Prime Programmer can program or configure all Intel devices supported by the Intel® Quartus® Prime software. The Intel® Quartus® Prime Programmer can also program EPC2, EPC4, EPC8, and EPC16 configuration devices in JTAG mode. The JTAG chain can contain any number and combination of Intel and non-Intel devices that comply with the IEEE 1149.1 JTAG specification.