At present, various new technologies and new standards in the field of Integrated Circuit (IC) continue to emerge, such as SATA, DVI, 10GEA, XFP, UXF, etc., while performance indicators continue to improve, such as data storage capacity and transmission speed. It means that the IC circuit layout integration density increases, the data rate increases, the power supply voltage decreases, the signal and clock jitter and the noise threshold decreases, the power supply voltage decreases the path anti-interference, and the reasonable design of PCB traces, through holes, connectors and cables is crucial.

After the software design schematic and simulation are completed, in order to eliminate the hidden trouble of the circuit board, ensure that every device, every signal, every unit module is working normally, that is, to ensure that the IC meets the functional objectives, every step of the hardware test is crucial, including PCB verification, component verification, unit function verification, internal and external bus verification, design function testing, etc. Hardware testing ensures mass production and economic value is realized.

IC hardware test is generally divided into two parts: non-power-on and power-on test. Perform performance test in non-power-on environment first, and then power-on test after passing.

First, non-power-on link test program:

According to the circuit schematic, check whether the chip power supply, node labeling and connection are correct. Measure the input impedance of the power supply and verify that the power supply voltage is normal.

Check whether the components are installed correctly according to the circuit diagram, component package type and pin sequence. Do open circuit and short circuit test.

Ii. Power-on test scheme:

After powering on the circuit board, observe whether there is any abnormality (including smoke, odor, hot, etc.), once the power is off immediately, and then power on after troubleshooting.

Static debugging (generally means that no signal is added or only a fixed level signal is added for DC test) and dynamic test (input the appropriate excitation signal at the input end of the circuit board), detect the potential of each point to determine whether the DC work is normal, and whether the output signal of each test point is normal.