Dear teachers,I drew a four-layer board and laid copper, and the following two problems occurred. Can you give me a solution?
1 For the same GND network, some boxes have no copper, while others can in
The 0-10V analog signal is converted into a modulated signal by the APC chip GP9301M, and then transmitted to the PAC chip GP8101M after passing through the isolation capacitor. The GP8101M demodulate
485 point-to-multiple communication, using modbus communication protocol, daisy-type connection, FPGA sends data, and two devices are mounted to receive data (address 01 and 02). It is sent in serial
A device was returned for repair in the project. During the investigation, it was found that the BOOT program was missing, the application program was normal, and the BOOT area stored garbled code. Th