PCB新聞 - PCB複製板設計的各種訊號佈線要求和技巧

對於 PCB複製板設計 主機板的, 各種類型訊號的路由是必須注意的一部分. 因為主機板上設計了多種類型的訊號, 各種訊號軌跡有不同的規格和要求, 確保主機板設計準確可行, 有必要深入瞭解各種訊號的軌跡. 在這裡, 我們詳細介紹了主機板設計中常見訊號類型的佈線規格和要求.

1, CPU wiring:

The wiring of the CPU is generally 5/10. 控制線的間距應稍大一些, 約20密耳.

<1>Data lines (0-63) 64 pieces;

<2>Address line (3-31) REQ(0-4) etc.

<3>Control line (generally distributed between the data line 和 the address line)

When the data lines are routed, 每16行分組在一起，並在同一層上運行.

(0-15) (16-31) (32-47) (48-63) and each group distributes 2-3 control lines,

當地址線被路由時, 每16行分組在一起，並在同一層上運行. The difference is that the Address lines are not from (3-31) before (0-2). 一般分為2組,

<1>(3-16) Add 5 REQ lines, 18;

<2>(17-31) 16 pieces;

When the CPU signal is routed, 應使用20-30mil接地線將其與其他訊號分離, 例如DDR訊號, 便於使用通孔下方的內部GND，並起到接地作用.

2, DDR signal:

In addition to the Control line, DDR線通常為5/10控制線，以保持20mil的線間距. 比如CPU, it is mainly divided into the following three categories:

<1>Data line (0-63) 64 lines

<2>Address line (0-13) There are also some address signal lines with other names,

<3>Control line (generally distributed between the data and address lines)

When the Data line is routed, 每8行為一組, 加上2條DQM和DQS控制線，一起走在同一層上. The main grouping methods are:

MD (0-7) add DQM0 DQS0

MD (8-15) plus DQM 1 DQS 1

MD (16-23) plus DQM 2 DQS 2

MD (24-31) plus DQM3 DQS 3

MD (32-39) plus DQM 4 DQS 4

MD (40-47) plus DQM 5 DQS 5

MD (48-55) plus DQM 6 DQS 6

MD (56-63) plus DQM 7 DQS 7

Address lines are all together as much as possible;

In addition, DDR部分中有3對CLK線. 如果是雙通道DDR, 有6對CLK線路. CLK應配對，並與其他訊號保持至少20密耳的距離.

DDR, 比如CPU, 還應使用20-30mil接地訊號與其他訊號分離, mainly the CPU and AGP signals

3, CLK signal:

The CLK signal is an important signal in the motherboard, generally as large as the following:

<1>200 trillion

<2>100 trillion

<3>66 trillion

<4>48 trillion

<5>16 trillion

The above is the introduction of various signal routing requirements and techniques for PCB複製板設計. Ipcb還提供 PCB製造商 and PCB製造 科技.