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UNDERSTANDING THE TROUBLESHOOTING
MICROPROCESSOR HARDWARE TROUBLESHOOTING
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activity address bus address lines application basic buffer buses capability capture Chapter checksum chip select circuit tracing circuitry clock clock signal components configuration control register current tracer data bus data compression debug decoder detected device diagnostics display edge environment EPROM error example execution failed failure fault Fluke free-run functional testing gate glitch ground hardware Hewlett-Packard I/O ports illustrated in Figure implemented indicated in Figure input port interface interrupt request kernel keypad latch logic analyzer logic levels logic probe LOOP memory microprocessor Microprocessor Systems mode node noise operation oscilloscope output port pattern problem processor RAM test reset routines sampling segment self-test sequence short shown in Figure signature analysis socket solenoid specific Step strategy stuck subsystem switches synchronized system under test techniques toggle trigger troubleshooting unit under test valid verify voltage waveforms write