The following steps are required to judge the quality of the eight-pin chip :
1. Install the chip and execute the corresponding program in the system;
2. Test whether the hardware device or component controlled by the chip is normal;
3. Debug or modify the program to make the program compatible with the eight-pin chip;
4. Test the read and write function of each memory unit of the eight-pin chip, such as register and flash memory; 5. Test whether the communication between the chip and the system is smooth, such as serial port and I2C bus;
6. Check the performance and power consumption to see whether the requirements can be met; 7. After many tests, if there is no obvious fault, the eight-pin chip can be considered to be good, otherwise, it needs to be checked and troubleshooting.
The way to judge the quality of the eight-pin chip is to first observe whether the corner of the eye is normal, whether the corner of the eye is broken, and then use a multimeter to measure whether the pin of the chip of the power chip is short-circuited. If there is a short circuit, the chip has been damaged internally. At this time, the chip cannot be used normally, and a normal chip needs to be replaced.
1. The function and definition of each pin of this chip need to be determined first.
2, Detect whether the power output pin has normal voltage, determine whether there is a break.
3, measure the ground resistance value, determine whether short circuit.