PCB Designbi_tool~10 mins

Route planning for two-layer board in PCB Design - Cell-by-Cell Formula Trace

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Sample Data

This data shows two nets to be routed on a two-layer PCB. Each net has start and end coordinates (X,Y) and the layer (Top or Bottom) where the route should be planned.

Cell	Value
A1	Net
B1	Start X
C1	Start Y
D1	End X
E1	End Y
F1	Layer
A2	Net1
B2	2
C2	3
D2	7
E2	3
F2	Top
A3	Net2
B3	5
C3	1
D3	5
E3	6
F3	Bottom

Formula Trace

RouteLength = ABS(D2 - B2) + ABS(E2 - C2)

Step 1: ABS(7 - 2)

Step 2: ABS(3 - 3)

Step 3: 5 + 0

Cell Reference Map

    A      B      C      D      E      F
1 | Net  | StartX| StartY| EndX  | EndY  | Layer |
2 | Net1 |   2   |   3   |   7   |   3   | Top   |
3 | Net2 |   5   |   1   |   5   |   6   | Bottom|

The formula references cells B2, C2, D2, and E2 to calculate the route length for Net1.

Result

    A      B      C      D      E      F      G
1 | Net  | StartX| StartY| EndX  | EndY  | Layer | RouteLength |
2 | Net1 |   2   |   3   |   7   |   3   | Top   |     5      |
3 | Net2 |   5   |   1   |   5   |   6   | Bottom|             |

The RouteLength column shows the calculated route length for Net1 as 5 units, which is the sum of horizontal and vertical distances between start and end points on the Top layer.

Sheet Trace Quiz - 3 Questions

Test your understanding

What is the horizontal distance calculated for Net1?

Key Result

RouteLength = ABS(EndX - StartX) + ABS(EndY - StartY) calculates Manhattan distance for routing on a layer.