集成电路设计,单片机方案
Your current location : Home>News>Industry information

Contact Us

Wuxi Xijie Microelectronics Co., Ltd

Mobile:151 6157 6380

E-mail:cathy@xjmcu.com

Website: www.xjmcu.com

Address:Floor 9, building A1, No. 777, Jianzhu West Road, Binhu District, Wuxi City, Jiangsu Province


Troubleshooting of single chip microcomputer Scheme Application

2022-01-19

1. The three conditions for the normal operation of the single chip microcomputer scheme are power supply, clock crystal oscillator and reset. When the single chip microcomputer can not work normally, we must first check these three conditions, use a voltmeter or multimeter to detect its power supply and grounding pin, and detect whether the voltage between the two pins is about 5V; For whether the clock crystal oscillation works normally, we can use an oscilloscope to detect whether the sine wave pulse of corresponding frequency can be detected; Reset detection is relatively simple. The reset level of single chip microcomputer is generally high-level reset. When the single chip microcomputer is connected to the power supply, there will be a high level of about 5V on the reset pin. In addition, when the reset button is pressed, there will also be a high level on the reset pin. It can be detected with a general voltmeter or multimeter.

Single chip microcomputer scheme

2. The detection of whether the MCU works normally is whether the MCU works normally. We mainly detect and troubleshoot by writing programs. This detection needs the hardware and software of "burn in" code. The principle of detection is to "burn in" a normal code with detection function to the single chip microcomputer through the hardware and software of "burn in" code. Check two aspects: one is whether the object code can be normally written into the single chip microcomputer. When it cannot be normally written into the single chip microcomputer, it indicates that the single chip microcomputer has been damaged and needs to be replaced with the single chip microcomputer of the same model; The second is that the object code can be normally written into the single chip microcomputer. Is the effect after writing the function set by the program? If so, it shows that the single chip microcomputer is normal. When replacing the single-chip microcomputer, we can use the single-chip microcomputer of the same model, and then write the target code given by the company. At present, the price of the single-chip microcomputer is generally cheaper, and the retail price is about 5 yuan.


Copyright © Wuxi Xijie Microelectronics Co., LTD. All rights reserved苏ICP备18012310号-1 Mainly engaged inMicroelectronics,Integrated circuit design,Single chip solutions, Welcome to inquire! Service support:无锡网站建设