There is a device on the board. I don't know what it is. It says BU257. It is a 16-pin 8*2 chip. I googled it but still couldn't find any useful information. If anyone knows, please tell me. Thanks....
Dear experts, please help me choose a voltage comparator. Its function is to detect that the voltage at the capacitor end is equal to the reference voltage of the comparator, so that the trigger circu...
After posting 500 boards and shipping over 200 devices recently, 6 boards had to be repaired with 0.1uf capacitor failures (in different locations, both in the reset circuit and the filter circuit).
T...
ZTE
The communication embargo incident has impacted the communication industry and sounded the alarm for the semiconductor industry. Let's follow the embedded editor to learn more about the r...[Details]
This part of the code in the void SystemClock_Config(void) function in the main file generated by stm32cubemx RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; This bug occurs, and the f...[Details]
I used STM32CubeMX V4.22.1 to generate a project including EHT and Lwip. The debugging has been abnormal. After careful inspection, the following problems were found: 1. The hardware uses LAN8720A, b...[Details]
LAN8720 configuration: IP: 192.168.192.30 Gateway: 192.168.192.1 A high frequency of ARP packets is detected The content of the packet asks for the mac address of 192.168.192.1, and asks the resp...[Details]
Function List and Notes (lower-level driver part) 1. IO port initialization: control IO and communication IO. Control includes power control, reset and low power mode. Communication is the serial po...[Details]
Serial Port: 一. USART_ITConfig(USART1, USART_IT_TXE, ENABLE): As long as the transmit register is empty, there will always be an interrupt. Therefore, if you are not sending data, turn off the tran...[Details]
The independent watchdog of STM32 is driven by a dedicated internal 40Khz low-speed clock, that is, it is still effective even if the main clock fails. Here we need to note that the clock of the inde...[Details]
1. What is PWM What is PWM? Professionally speaking, it is pulse width modulation. In layman's terms, it is the continuous output of high and low levels. For example, the microcontroller outputs...[Details]
The circuit shown in the figure requires that the light is off when the machine is turned on. Press the button once, and the light D1 will turn on and automatically turn off after a delay of 10 secon...[Details]
Requirements: Set timer T1 as an external event counter, count 500 pulses every time, then switch T1 to timing mode and output a positive pulse with a width of 10ms at P1.2. Over and over again. A...[Details]
According to a report by Russian News Agency on November 23, Alexander Hanin, founder and general manager of VisionLabs, a Russian facial recognition software development company, believes that in ...[Details]
In one of my products, there are two chips, AVR and PIC, at the same time. When AVR drives the relay, then drives the contactor. PIC is used for display. I found that PIC actually has a little interf...[Details]
At the early morning of November 17th, Beijing time, at the Global Supercomputing Conference held in Denver, the United States, the "nonlinear earthquake simulation" application completed by the te...[Details]
MSP430 ADC10 single channel multiple conversions #include "msp430x22x4.h" #define uchar unsigned char #define uint unsigned int #define LCDen 0X80; //The upper three bits of P3 are used as cont...[Details]
Microcontroller MCU
京公网安备 11010802033920号
EEWORLD
