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Pin assignment

gpeyton

Hi,

I have two groups of pins for the LEFT and RIGHT sides. I have 2 problems relating to the code below.

  1. The pins appear ok in the GUI, but the spacing seems to be set to 3.2, not 2.5 as expected. Min width is not 3.2um
  2. the LEFT and RIGHT pins are not aligned in y-dim. I tried to align them using offsetStart, but that didn't work.

Many thanks for the assistance.

set interface_pin_pitch 2.5
set pin_width 0.5

editPin -pin $interface_pins \
-layer $interface_layer \
-fixedPin 1 \
-edge 2 \
-offsetStart [expr $interface_pin_pitch/2] \
-spacing $interface_pin_pitch \
-spreadType CENTER \
-pinWidth $pin_width \

editPin -pin $addr_pins \
-layer $interface_layer \
-fixedPin 1 \
-edge 0 \
-spacing $interface_pin_pitch \
-spreadType CENTER \
-pinWidth $pin_width \

  • Hi,
    how much is the misalignment that you have ? Is it in the range of your track pitch ? You can query your track pitch with:
    get_db [get_db layers $interface_layer] .pitch_y

    The default behavior is to snap the pins to the closest routing track. You can change this with the -snap switch, e.g. -snap MGRID to snap to the manufacturing grid. 

    - Dimo

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