LibreSilicon stack - Revision history

Leviathan: /* Pad Cells */

2026-05-29T09:37:56Z

Pad Cells

← Older revision		Revision as of 09:37, 29 May 2026
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	=== Pad Cells ===		=== Pad Cells ===
	The [[Pad Cell Generator]] is part of the [[LibrePDK]] and can be used to created custom sets of pad cells with custom rail voltages and you can even define a set of currents your pad frame is supposed to end up driving.		The [[Pad Cell Generator]] is part of the [[LibrePDK]] and can be used to created custom sets of pad cells with custom rail voltages and you can even define a set of currents your pad frame is supposed to end up driving.
	[[File:~~Io cell 20mA~~.png\|none\|thumb\|~~20mA~~ pad cell for IHPSG13G2 at 1.2V]]		[[File:30mA SG13G2@1V2 v2.png\|none\|thumb\|419x419px\|30mA pad cell for IHPSG13G2 at 1.2V]]
	The pad cell has such thin wires, because the ultimate wire width has to be determined based on the final current which is supposed to be driven by the overall pad frame the cells are being generated for.		The pad cell has such thin wires, because the ultimate wire width has to be determined based on the final current which is supposed to be driven by the overall pad frame the cells are being generated for.
	=== Pad Frames ===		=== Pad Frames ===

Leviathan: /* Pad Frames */

2026-05-29T09:28:30Z

Pad Frames

← Older revision		Revision as of 09:28, 29 May 2026
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	The pad cell has such thin wires, because the ultimate wire width has to be determined based on the final current which is supposed to be driven by the overall pad frame the cells are being generated for.		The pad cell has such thin wires, because the ultimate wire width has to be determined based on the final current which is supposed to be driven by the overall pad frame the cells are being generated for.
	=== Pad Frames ===		=== Pad Frames ===
	The [[Pad Frame Generator]] has the job of taking in a JSON with pin assignment for the East, North, South and West bank and then calculate the wire dimensions of the overall padframe based on the projected peak currents as well as to choose the right pad cell type for each assigned pin.[[File:~~Preliminary First~~ Pad Frame ~~generated~~.png\|thumb\|~~An example of an early result of LibrePDK\|none~~]]		The [[Pad Frame Generator]] has the job of taking in a JSON with pin assignment for the East, North, South and West bank and then calculate the wire dimensions of the overall padframe based on the projected peak currents as well as to choose the right pad cell type for each assigned pin.
			[[File:Pad Frame v2 Example SG13G2@1V2.png\|none\|thumb\|Pad Frame Example SG13G2@1.2V]]
	The resulting output will be a pad frame in Magic, GDS2, LEF and DEF format, which you can use for placing and routing your internal logic to.		The resulting output will be a pad frame in Magic, GDS2, LEF and DEF format, which you can use for placing and routing your internal logic to.

Leviathan: /* Pad Cells */

2026-05-28T16:15:04Z

Pad Cells

← Older revision		Revision as of 16:15, 28 May 2026
Line 18:		Line 18:
	=== Pad Cells ===		=== Pad Cells ===
	The [[Pad Cell Generator]] is part of the [[LibrePDK]] and can be used to created custom sets of pad cells with custom rail voltages and you can even define a set of currents your pad frame is supposed to end up driving.		The [[Pad Cell Generator]] is part of the [[LibrePDK]] and can be used to created custom sets of pad cells with custom rail voltages and you can even define a set of currents your pad frame is supposed to end up driving.
			[[File:Io cell 20mA.png\|none\|thumb\|20mA pad cell for IHPSG13G2 at 1.2V]]
			The pad cell has such thin wires, because the ultimate wire width has to be determined based on the final current which is supposed to be driven by the overall pad frame the cells are being generated for.
	=== Pad Frames ===		=== Pad Frames ===
	[[File:Preliminary First Pad Frame generated.png\|thumb\|An example of an early result of LibrePDK\|none]]		The [[Pad Frame Generator]] has the job of taking in a JSON with pin assignment for the East, North, South and West bank and then calculate the wire dimensions of the overall padframe based on the projected peak currents as well as to choose the right pad cell type for each assigned pin.[[File:Preliminary First Pad Frame generated.png\|thumb\|An example of an early result of LibrePDK\|none]]


			The resulting output will be a pad frame in Magic, GDS2, LEF and DEF format, which you can use for placing and routing your internal logic to.

	==Physical manufacturing==		==Physical manufacturing==

Leviathan: /* Pad Cells */

2026-05-28T16:11:19Z

Pad Cells

← Older revision		Revision as of 16:11, 28 May 2026
Line 17:		Line 17:

	=== Pad Cells ===		=== Pad Cells ===
	~~[[File:Preliminary First Pad Frame generated.png\|thumb\|An example of an early result of LibrePDK\|none]]~~
	The [[Pad Cell Generator]] is part of the [[LibrePDK]] and can be used to created custom sets of pad cells with custom rail voltages and you can even define a set of currents your pad frame is supposed to end up driving.		The [[Pad Cell Generator]] is part of the [[LibrePDK]] and can be used to created custom sets of pad cells with custom rail voltages and you can even define a set of currents your pad frame is supposed to end up driving.


	=== Pad Frames ===		=== Pad Frames ===
			[[File:Preliminary First Pad Frame generated.png\|thumb\|An example of an early result of LibrePDK\|none]]



	==Physical manufacturing==		==Physical manufacturing==

Leviathan at 16:10, 28 May 2026

2026-05-28T16:10:42Z

← Older revision		Revision as of 16:10, 28 May 2026
Line 17:		Line 17:

	=== Pad Cells ===		=== Pad Cells ===
	[[File:Preliminary First Pad Frame generated.png\|thumb\|An example of an early result of LibrePDK]]		[[File:Preliminary First Pad Frame generated.png\|thumb\|An example of an early result of LibrePDK\|none]]
	The [[Pad Cell Generator]] is part of the [[LibrePDK]] and can be used to created custom sets of pad cells with custom rail voltages and you can even define a set of currents your pad frame is supposed to end up driving.		The [[Pad Cell Generator]] is part of the [[LibrePDK]] and can be used to created custom sets of pad cells with custom rail voltages and you can even define a set of currents your pad frame is supposed to end up driving.

			=== Pad Frames ===

	==Physical manufacturing==		==Physical manufacturing==

Leviathan: /* Pad Cells */

2026-05-25T21:58:57Z

Pad Cells

← Older revision		Revision as of 21:58, 25 May 2026
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	=== Standard Cells ===		=== Standard Cells ===
	~~TODO: More text~~		You need standard logic cells, small logic gate layouts made from place and routing discrete FETs, in order to turn the RTL level logic Yosys spits out into an actual digital chip layout.

	[[StdCellLib]]		Originally Philip was working on [[StdCellLib]], but he re-licensed it under Apache which kind of defeats the purpose of a project calling itself '''Libre'''Silicon. Because Leviathan was a bit triggered by this due to his definition of Libre being the same as the Free Software Foundation, which means, that it's supposed under a GNU Public License, he decided to work on introducing the functionality for placing and routing standard logic cells in [[LibrePDK]] as well, in addition to analog and pad cell generation.

	=== Pad Cells ===		=== Pad Cells ===
	~~TODO~~: ~~More text~~		[[File:Preliminary First Pad Frame generated.png\|thumb\|An example of an early result of LibrePDK]]
			The [[Pad Cell Generator]] is part of the [[LibrePDK]] and can be used to created custom sets of pad cells with custom rail voltages and you can even define a set of currents your pad frame is supposed to end up driving.
	[[Pad Cell Generator]]

	==Physical manufacturing==		==Physical manufacturing==

Leviathan: /* Standard Cells */

2025-07-19T13:28:52Z

Standard Cells

← Older revision		Revision as of 13:28, 19 July 2025
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	=== Standard Cells ===		=== Standard Cells ===
			TODO: More text

			[[StdCellLib]]

	=== Pad Cells ===		=== Pad Cells ===
			TODO: More text

			[[Pad Cell Generator]]

	==Physical manufacturing==		==Physical manufacturing==

Leviathan at 13:05, 19 July 2025

2025-07-19T13:05:30Z

← Older revision		Revision as of 13:05, 19 July 2025
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	LibreSilicon can be roughly divided into two main categories, physical manufacturing as well as the tool chain part		LibreSilicon can be roughly divided into two main categories, physical manufacturing as well as the tool chain part

			== Software ==
			For doing anything useful with your foundry, you need a way of verifying your setup, for which we provide you the test wafer generator [[Danube River]], then you need standard logic cells for synthesizing, placing and routing your layout, and of pad cells so that you can wire bond your chip;

			=== Process Verification ===
			When setting up a new foundry, no matter the scale, the physical manufacturing needs to be verified, using a test wafer, for this purpose we provide a dynamic test wafer generator named [[Danube River]], which you can provide your own technology specs based on initial calculations for your setup and then verify and adjust your values until everything is correct.
	[[File:Danube For New Foundry.png\|none\|thumb\|653x653px]]		[[File:Danube For New Foundry.png\|none\|thumb\|653x653px]]

			=== Standard Cells ===

			=== Pad Cells ===

	==Physical manufacturing==		==Physical manufacturing==

Leviathan at 13:00, 19 July 2025

2025-07-19T13:00:38Z

← Older revision		Revision as of 13:00, 19 July 2025
Line 3:		Line 3:

	LibreSilicon can be roughly divided into two main categories, physical manufacturing as well as the tool chain part		LibreSilicon can be roughly divided into two main categories, physical manufacturing as well as the tool chain part
			[[File:Danube For New Foundry.png\|none\|thumb\|653x653px]]

	==Physical manufacturing==		==Physical manufacturing==

RaWa: /* Pysical manufacturing */ typo

2022-03-26T18:56:43Z

Pysical manufacturing: typo

← Older revision		Revision as of 18:56, 26 March 2022
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	LibreSilicon can be roughly divided into two main categories, physical manufacturing as well as the tool chain part		LibreSilicon can be roughly divided into two main categories, physical manufacturing as well as the tool chain part

	==~~Pysical~~ manufacturing==		==Physical manufacturing==

	The physical manufacturing includes things like:		The physical manufacturing includes things like: