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add doc for core ring control -- coming to open_pdks soon

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agorararmard
2020-09-29 18:11:17 +02:00
parent 99b1ca5976
commit 03744faffa
3 changed files with 10 additions and 2 deletions
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1
configuration/README.md
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@@ -70,6 +70,7 @@ These variables are optional that can be specified in the design configuration f
| `TOP_MARGIN_MULT` | The core margin, in multiples of site heights, from the top boundary. <br> (Default: `4`) |
| `LEFT_MARGIN_MULT` | The core margin, in multiples of site widths, from the left boundary. <br> (Default: `12`) |
| `RIGHT_MARGIN_MULT` | The core margin, in multiples of site widths, from the right boundary. <br> (Default: `12`) |
| `FP_PDN_CORE_RING` | Enables adding a core ring around the design. More details on the control variables in the pdk configurations documentation. 0=Disable 1=Enable. <br> (Default: `0`) |
### Placement

2
configuration/floorplan.tcl
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@@ -26,6 +26,8 @@ set ::env(FP_PDN_VPITCH) 153.6
set ::env(FP_PDN_HOFFSET) 16.65
set ::env(FP_PDN_HPITCH) 153.18
set ::env(FP_PDN_CORE_RING) 0
set ::env(FP_IO_MODE) 1; # 0 matching mode - 1 random equidistant mode
set ::env(FP_IO_HLENGTH) 4
set ::env(FP_IO_VLENGTH) 4

9
doc/PDK_STRUCTURE.md
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@@ -49,8 +49,13 @@ This section defines the neccessary variables for PDK configuration file
| `CTS_SQR_RES` | Defines the resistance per square micron, used in CTS. |
| `FP_PDN_RAIL_OFFSET` | Defines the rail offset for met1 used in PDN. <br> Default: `0`. |
| `FP_PDN_VWIDTH` | Defines the strap width for the vertical layer used in PDN. <br> Default: `1.6`. |
| `FP_PDN_HWIDTH` | Defines the strap width for the vertical layer used in PDN. <br> Default: `1.6`. |
| `FP_PDN_HWIDTH` | Defines the strap width for the horizontal layer used in PDN. <br> Default: `1.6`. |
| `FP_PDN_CORE_RING_VWIDTH` | Defines the vertical width for the vertical layer used to create the core ring in the PDN. <br> Default: `20`. |
| `FP_PDN_CORE_RING_HWIDTH` | Defines the horizontal width for the horizontal layer used to create the core ring in the PDN. <br> Default: `20`. |
| `FP_PDN_CORE_RING_VSPACING` | Defines the spacing for the vertical layer used to create the core ring in the PDN. <br> Default: `5`. |
| `FP_PDN_CORE_RING_HSPACING` | Defines the spacing for the horizontal layer used to create the core ring in the PDN. <br> Default: `5`. |
| `FP_PDN_CORE_RING_VOFFSET` | Defines the offset for the vertical layer used to create the core ring in the PDN. <br> Default: `20`. |
| `FP_PDN_CORE_RING_HOFFSET` | Defines the offset for the horizontal layer used to create the core ring in the PDN. <br> Default: `20`. |
## Standard cell library-specific variables