印制電路板的設計規范(已修改)

　

【正文】 目錄1 印制線路板（PCB）說明 .....................................................................................................................................................4 印制線路板定義 .............................................................................................................................................................4 印制線路板基本組成 .....................................................................................................................................................4 印制線路板分類 .............................................................................................................................................................42 原理圖入口條件 .....................................................................................................................................................................53 原理圖的使用 .........................................................................................................................................................................64 結構圖入口條件（游） .........................................................................................................................................................75 結構圖的使用 .........................................................................................................................................................................86 電路分類 .................................................................................................................................................................................9 從安規角度分類 .............................................................................................................................................................9 布局設計要求 .................................................................................................................................................................9 各類電路距離要求 .........................................................................................................................................................9 其他要求 .......................................................................................................................................................................107 規則設置 ...............................................................................................................................................................................11 規則分類 .......................................................................................................................................................................11 基本設置 .......................................................................................................................................................................11 特殊區域 .......................................................................................................................................................................12 電源、地信號設置 .......................................................................................................................................................13 時鐘信號設置 ...............................................................................................................................................................13 差分線的設置 ...............................................................................................................................................................13 等長規則 .......................................................................................................................................................................14 最大過孔數目規則 .......................................................................................................................................................14 拓撲規則 .......................................................................................................................................................................14 其他設置 .......................................................................................................................................................................158 安規、EMC ..........................................................................................................................................................................16 PCB 板接口電源的 EMC 設計 ...................................................................................................................................16 板內模擬電源的設計 ...................................................................................................................................................16 關鍵芯片的電源設計 ...................................................................................................................................................17 普通電路布局 EMC 設計要求 ....................................................................................................................................17 接口電路的 EMC 設計要求 ........................................................................................................................................17 時鐘電路的 EMC 設計要求 ........................................................................................................................................17 其他特殊電路的 EMC 設計要求 ................................................................................................................................18 其他 EMC 設計要求 ....................................................................................................................................................189 DFX 設計 ..............................................................................................................................................................................19 空焊盤（DUMMY PAD ） ...............................................................................................................................................19 0402 阻容器件的應用條件 .......................