High level reset:
Keywords：MCU
Reference address：High level reset and low level reset of microcontroller
The principle can be understood as follows: as soon as the microcontroller is powered on, the capacitor is equivalent to a short circuit, so the 5V voltage is all concentrated on the 4.7K resistor. Then, the capacitor begins to charge. When it is charged to a certain point, the 5V voltage is basically concentrated on the capacitor, and the voltage on the resistor is lower than the high-level voltage required by the microcontroller.
Low level reset:
The principle can be understood as follows: when the power is just turned on, the capacitor is regarded as a short circuit, the RST pin is equivalent to grounding, and then the capacitor begins to charge. As the capacitor voltage continues to increase, the resistor voltage continues to decrease, that is, the RST pin voltage continues to rise until it becomes a high level, and the reset ends.
In addition, low level reset was used in the early days.
After the reset is completed, the reset signal needs to be maintained at a high level, which brings about power consumption problems. Some people use high-level reset
As the operating voltage decreases, taking the impact of noise into consideration, people tend to choose a low level.
Previous article：KeilC51 connects with Proteus to debug VDM51.dll
Next article：MCU decoding PPM signal
Recommended ReadingLatest update time:2024-11-23 12:01
Realize sending on PIC microcontroller p18f458
//This program runs on the p18f458 microcontroller to implement the self-test mode of sending buffer 0 to receiving buffer 0, where receiving uses interrupt mode //sending uses query mode #include "p18f458.h" int CAN _FLAG; //Define the flag register //**************Initialization subroutine*************** v
[Microcontroller]
STC12C5A32S2 MCU 1602 gradual display
The basic framework is written according to the program in Guo Tianxiang's Lesson 8, but when fading in, the instruction Guo used is write_com(0x18); But when I used it, it just didn't show up, so according to the 1602 manual, I used another instruction write_com(0x07) //When writing a character, the entire screen d
[Microcontroller]
Interface Technology between TI54xxDSP and 51 MCU
1 Hardware Design 1.1 Timing Matching HPI8 has a total of 18 signal lines, including 8 data lines (HD0 ~ HD7), and the remaining 10 are control lines, as listed in Table 1 Click to see the original image ①HAS: In the MCU with multiplexed data and address, it is connected to the ALE signal, and latches
[Microcontroller]
Design and production of single chip microcomputer lithium battery capacity tester
A few days ago, I saw that my lithium battery vacuum cleaner ran out of power at home. However, after it was fully charged, it ran out of power again after a while. The battery clearly showed that there were still two bars left. I thought this thing was too unreliable, so I thought it would be great if I could test th
[Microcontroller]
Playing with MCU, you and I are both rookies (continued 1)
It took me a lot of effort to muster up the courage to write this blog post. It's not because I'm good at microcontrollers. But I did take a lot of detours to learn microcontrollers. It's not until now that I really got started and started my own microcontroller fun journey. The purpose of writing this blog post
[Microcontroller]
Research on Uninterruptible Power Supply Based on MR16 Single Chip Microcomputer
0 Preface
With the development of computer network technology, global communication technology and high-precision processing industry, the requirements for power supply are getting higher and higher. In order to ensure the reliability and stability of power supply, UPS is being more and more widely us
[Microcontroller]
P89C51RD2 MCU Pinout and Package Description
P89C51RD2 MCU Pinout and Package
DIP40 PIN
PLC44 PIN
[Microcontroller]
The development and utilization of single chip microcomputer in human language interaction
(1) Design intention. Language is a unique way of communication for humans, and it plays an incomparable role in the long process of human social development. Making machines "speak" has always been the direction of electronic technology's continuous efforts, and language synthesis is an important part of human-machi
[Microcontroller]
- Popular Resources
- Popular amplifiers
-
Wireless Sensor Network Technology and Applications (Edited by Mou Si, Yin Hong, and Su Xing) - Modern Electronic Technology Training Course (Edited by Yao Youfeng)
- Modern arc welding power supply and its control
- Small AC Servo Motor Control Circuit Design (by Masaru Ishijima; translated by Xue Liang and Zhu Jianjun, by Masaru Ishijima, Xue Liang, and Zhu Jianjun)
Wireless Sensor Network Technology and Applications (Edited by Mou Si, Yin Hong, and Su Xing)
Latest Microcontroller Articles
- Naxin Micro and Xinxian jointly launched the NS800RT series of real-time control MCUsOn November 20, Naxin Micro announced that it would launch the NS800RT series of real-time control MCUs in cooperation with ChipSine. This series of MCUs has more efficient and powerful real-time control capabilities and rich ...
- How to learn embedded systems based on ARM platform1. The concept of embedded system focuses on understanding the concept of "embedded" from three aspects: 1. From the hardware perspective, the CPU-based peripheral devices are integrated into the CPU chip, such as the early X86-based ...
- Summary of jffs2_scan_eraseblock issuesSummarize the problems encountered before: 1 Similar: mtd->read(0x44 bytes from 0x68cf44) returned ECC errorjffs2_get_inode_nodes(): CRC failed ...
- Application of SPCOMM Control in Serial Communication of Delphi7.0Abstract: Using Delphi to develop industrial control system software has become the choice of more and more developers, and serial port communication is one of the problems that must be solved in this process. ...
- Using TComm component to realize serial communication in Delphi environmentAbstract: Using Delphi to develop industrial control system software has become the choice of more and more developers, and serial port communication is one of the problems that must be solved in this process. ...
- Bar chart code for embedded development practices
- Embedded Development Learning (10)
- Embedded Development Learning (8)
- Embedded Development Learning (6)
He Limin Column
Microcontroller and Embedded Systems Bible
Professor at Beihang University, dedicated to promoting microcontrollers and embedded systems for over 20 years.
MoreSelected Circuit Diagrams
MorePopular Articles
- Intel promotes AI with multi-dimensional efforts in technology, application, and ecology
- ChinaJoy Qualcomm Snapdragon Theme Pavilion takes you to experience the new changes in digital entertainment in the 5G era
- Infineon's latest generation IGBT technology platform enables precise control of speed and position
- Two test methods for LED lighting life
- Don't Let Lightning Induced Surges Scare You
- Application of brushless motor controller ML4425/4426
- Easy identification of LED power supply quality
- World's first integrated photovoltaic solar system completed in Israel
- Sliding window mean filter for avr microcontroller AD conversion
- What does call mean in the detailed explanation of ABB robot programming instructions?
MoreDaily News
- STMicroelectronics discloses its 2027-2028 financial model and path to achieve its 2030 goals
- 2024 China Automotive Charging and Battery Swapping Ecosystem Conference held in Taiyuan
- State-owned enterprises team up to invest in solid-state battery giant
- The evolution of electronic and electrical architecture is accelerating
- The first! National Automotive Chip Quality Inspection Center established
- BYD releases self-developed automotive chip using 4nm process, with a running score of up to 1.15 million
- GEODNET launches GEO-PULSE, a car GPS navigation device
- Should Chinese car companies develop their own high-computing chips?
- Infineon and Siemens combine embedded automotive software platform with microcontrollers to provide the necessary functions for next-generation SDVs
- Continental launches invisible biometric sensor display to monitor passengers' vital signs
Guess you like
- CMX868 Programmer Quick Guide
- Discussion on unit conversion (repost)
- GD32L233C running RT-Thread Nano
- Common FPGA debugging techniques
- [ESP32-S2-Kaluga-1 Review] Use of the console component
- Simulation study on dynamic performance of 200km/h EMU
- Communication failure
- Simple Measurement of Operational Amplifiers
- Classic river crossing puzzle game
- How to Use Multimeter to Measure Ground Resistance
京公网安备 11010802033920号