Digital Systems Testing And Testable Design Solution High Quality ((exclusive))

| Module | DFT Method | Coverage Target | |--------|------------|----------------| | CPU core | Full scan + at-speed | 99% stuck, 97% transition | | SRAM | MBIST (March C+) | 100% stuck, 98% coupling | | Crypto | Logic BIST (LFSR/MISR) | 95% stuck | | I/O pins | JTAG boundary scan | 100% interconnect | | Analog (ADC) | Loopback test via DFT mux | Functional |

High toggle rates during scan shift can cause IR drop → false failures. Solutions:

This article explores the fundamental principles of digital systems testing, the economics of quality, and the advanced solutions that separate high-reliability products from field failures.