#413 Weird cell LEF definitions for sky130 Issue created by donn 1. All EF cells • Lack a

SITE

definition • Are improperly(?) marked

CLASS BLOCK

instead of

CLASS CORE

as normal standard cells are

MACRO sky130_ef_sc_hd__decap_12
  CLASS BLOCK ;
  FOREIGN sky130_ef_sc_hd__decap_12 ;
  ORIGIN 0.000 0.000 ;
  SIZE 5.520 BY 2.720 ;
  PIN VGND
  …

2. All double-height cells in at least

fd_sc_hd

• Have their sites declared as

unithd

instead of the correct

unithddbl

, e.g.

MACRO sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_1
  CLASS CORE WELLTAP ;
  FOREIGN sky130_fd_sc_hd__lpflow_lsbuf_lh_hl_isowell_tap_1 ;
  ORIGIN 0.000 0.000 ;
  SIZE 6.440 BY 5.440 ;
  SYMMETRY X Y R90 ;
  SITE unithd ;
  …

When manually instantiated, those double-height cells will fail with the message "taller than any row" in OpenROAD for example, unless OpenROAD is instructed to explicitly construct double-height rows to accommodate them.

RTimothyEdwards/open_pdks