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In this blog we present various Design For Testability guidelines for JTAG/Boundary Scan. This test technology, standardized as IEEE 1149.1 and expanded with new standards such as IEEE 1149.4 and IEEE 1149.6 provides a powerful means to access device, board, and system level circuitry, enabling applications such as connectivity tests, on-board and in-system configuration and programming, and even simple functional tests and/or debugging and emulation.
For details about this and related technologies, please follow this link.