Some problems to be aware of when adjusting the adjustment

adjust the time to pay attention to some of the problems 1, connecting lines, such as DuPont Line, the needle will have a large interference signal, especially when the signal transmission on M must pay attention to the interference between the signals. A) As long as the quiet of the heart, everything can be done b) If the heart ice crystals, the sky is not surprised, leisurely, all under control c) To this realm has nothing to do with the schematic, PCB layout, become increasingly important I. Input and output lines can not be parallel for a long time, intermediate and GND isolation II. Digitally, simulate ground to be handled well, intermediate with magnetic beads isolated III. Digitally, simulate the copper, cross the bead, separate the sides Iv. the decoupling capacitor must be close to the IC, as far as possible V. The closer the crystal oscillator is to the IC the better VI. Crystal oscillator can not be too close to the power supply, nor too close to the heating device, the CLK line can not be parallel with the signal line, Vii. high-frequency line cannot be parallel for long time, and the shorter the line, the better. Viii. High-frequency IC communication to prevent signal emission, so-called impedance matching IX. Also pull down to ensure the integrity of the signal X. The power supply is not close to the master chip and is filtered to be considered as a simulated ground XI. Many times the power supply directly to the digital IC, in fact, that is analog ground digital mixing, if there is digital analog isolation, power supply for analog, digital IC, Analog IC, strictly abide by

Some problems to be aware of when adjusting the adjustment