Astro学习(2)Floorplan

Floorplan分两部分, block level 和 Chip level

今天先写 block level的大致流程

1. Execute the axgRectiPlanner command to ensure that the floorplan is ready and that all of the pins are on the origin except for "boundary" mode.

选项有

Shape-based

  >>Scale
            >>Ratio
            >>True Length 实际长度
  >>Core Utilization 确定core的使用率
  >>Choice 几种形状的选择

Enter Boundary
--------------------------------------------
Row's direction 选择垂直还是水平

Double Back 选择这个会使得你的两个ROW背靠背

如果你不要背靠背(back to back),会出现如下的效果


Start from First Row
当选择了 Double Back时,如果选择了这个选项,则对于水平的ROW会从最底的那一层ROW就是背靠背的,对于垂直的ROW则会从最左边的ROW开始就是背靠背的

Flip First Row 将 ROW反转,效果如图 (对比之前的图)

Core to Left

Core to Right

Core to Bottom

Core to Top
效果如图

2. Load the Top Design Format (TDF) constraints for the rectilinear pins. The syntax is

rPin "pinName" layerNo width height sideNo [order  
[offset]] 

The side number isa positive integer and starts from 1. Given a rectangular shape, thelower left-most edge is the starting edge (side number 1). The sidenumber of the next edge, going clockwise, is 2, and so forth.

3. Execute the axRectiPinPlacement command to place the pins according to the TDF constraints.

4. Execute the  axgOptimizePinLoc command.