There are also two ways of layout, manual routing and automatic routing. PowerPCB provides manual routing capabilities that are powerful, including automatic push and online design rule checking (DRC). Automatic routing is performed by Specctra's cabling engine. Usually these two methods work together. The common steps are manual-auto-manual.
25. Sensitive circuits or devices (such as reset circuits, WATCHDOG circuits, etc.) are at least 1000 mils away from the edge of the board, especially the interface edge of the board.
1. PCB clock frequency exceeds 5MHZ or signal rise time is less than 5ns, generally requires the use of multi-layer board design.
PCB layout is the most important step in the design of electronic products. PCB layout and wiring will directly affect the performance of the circuit. Nowadays, although there are many softwares that can realize automatic PCB layout and routing, as signal frequencies continue to increase, engineers often need to understand the basic principles and techniques of PCB layout and routing to make their design perfect.
This article describes various techniques for three types of interconnect design, including device mounting methods, wiring isolation, and measures to reduce lead inductance.