Pad Cell Generator - Revision history

Leviathan: /* How to use */

2026-05-29T09:41:07Z

How to use

← Older revision		Revision as of 09:41, 29 May 2026
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	Running the following script within the LibrePDK folder, after following the installation instructions...<syntaxhighlight lang="bash">		Running the following script within the LibrePDK folder, after following the installation instructions...<syntaxhighlight lang="bash">
	~~#!/bin/bash~~		uv run librepdk_padframe_generator -i tests/padframes/padframe_sg13g2_1v2.json
	~~TECH=SG13G2~~
	~~VOLTAGE=1.2~~
	~~mkdir -p ihp_pads~~
	~~pushd ihp_pads~~
	uv run ~~librepdk_padcell_generator -t $TECH -v $VOLTAGE~~ -i ~~20,30,40,60~~
	~~popd~~
	</syntaxhighlight>You should end up with a set of pad cells dimensioned for 20mA, 30mA, 40mA and 60mA driver strength, plus a demo assembly which looks somewhat like this (still work in progress)		</syntaxhighlight>You should end up with a set of pad cells dimensioned for 20mA, 30mA, 40mA and 60mA driver strength, plus a demo assembly which looks somewhat like this (still work in progress)
	[[File:~~Preliminary First~~ Pad Frame ~~generated~~.png\|none\|thumb]]		[[File:Pad Frame v2 Example SG13G2@1V2.png\|none\|thumb]]

	== Electrical Discharge Protection ==		== Electrical Discharge Protection ==

Leviathan at 09:39, 29 May 2026

2026-05-29T09:39:11Z

← Older revision		Revision as of 09:39, 29 May 2026
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	[[File:~~Io cell 20mA~~@~~1.2V~~.png\|thumb\|~~20mA Pad Cell for IHP~~'s SG13G2@~~1.2V~~]]		[[File:30mA SG13G2@1V2 v2.png\|thumb\|'''Example 30mA SG13G2@1V2 (version 2)''']]
	The LibreSilicon Pad Cell Generator is an extension of the [[LibrePDK]] which besides the driver logic also dynamically generates the mixed signal parts needed for over current and static discharge protection and providing the currents needed for doing useful things with an actual physical chip, like driving an LED or a small motor.		The LibreSilicon Pad Cell Generator is an extension of the [[LibrePDK]] which besides the driver logic also dynamically generates the mixed signal parts needed for over current and static discharge protection and providing the currents needed for doing useful things with an actual physical chip, like driving an LED or a small motor.

Leviathan at 16:17, 28 May 2026

2026-05-28T16:17:06Z

← Older revision		Revision as of 16:17, 28 May 2026
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	[[File:Io cell 20mA@1.2V.png\|thumb\|~~Io cell~~ 20mA@1.2V]]		[[File:Io cell 20mA@1.2V.png\|thumb\|20mA Pad Cell for IHP's SG13G2@1.2V]]
	The LibreSilicon Pad Cell Generator is an extension of the [[LibrePDK]] which besides the driver logic also dynamically generates the mixed signal parts needed for over current and static discharge protection and providing the currents needed for doing useful things with an actual physical chip, like driving an LED or a small motor.		The LibreSilicon Pad Cell Generator is an extension of the [[LibrePDK]] which besides the driver logic also dynamically generates the mixed signal parts needed for over current and static discharge protection and providing the currents needed for doing useful things with an actual physical chip, like driving an LED or a small motor.

Leviathan at 16:15, 28 May 2026

2026-05-28T16:15:58Z

← Older revision		Revision as of 16:15, 28 May 2026
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			[[File:Io cell 20mA@1.2V.png\|thumb\|Io cell 20mA@1.2V]]
	The LibreSilicon Pad Cell Generator is an extension of the [[LibrePDK]] which besides the driver logic also dynamically generates the mixed signal parts needed for over current and static discharge protection and providing the currents needed for doing useful things with an actual physical chip, like driving an LED or a small motor.		The LibreSilicon Pad Cell Generator is an extension of the [[LibrePDK]] which besides the driver logic also dynamically generates the mixed signal parts needed for over current and static discharge protection and providing the currents needed for doing useful things with an actual physical chip, like driving an LED or a small motor.

	~~<blockquote></blockquote>~~

	== Existing Groundwork ==		== Existing Groundwork ==

Leviathan at 16:15, 28 May 2026

2026-05-28T16:15:33Z

← Older revision		Revision as of 16:15, 28 May 2026
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	The LibreSilicon Pad Cell Generator is an extension of the [[LibrePDK]] which besides the driver logic also dynamically generates the mixed signal parts needed for over current and static discharge protection and providing the currents needed for doing useful things with an actual physical chip, like driving an LED or a small motor.		The LibreSilicon Pad Cell Generator is an extension of the [[LibrePDK]] which besides the driver logic also dynamically generates the mixed signal parts needed for over current and static discharge protection and providing the currents needed for doing useful things with an actual physical chip, like driving an LED or a small motor.
	~~[[File:Preliminary First Pad Frame generated.png\|thumb\|First Version of a Padframe of IHP's SG13G2 generated by LibrePDK (Still needs some work)]]~~
	<blockquote></blockquote>		<blockquote></blockquote>

Leviathan: /* Configuration */

2026-05-26T02:33:13Z

Configuration

← Older revision		Revision as of 02:33, 26 May 2026
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	Please look at our reference technology folders like the design rule constraints and parameters, for which we introduced a somewhat standardized format with the advent of our [[Danube River]] test wafer generator.		Please look at our reference technology folders like the design rule constraints and parameters, for which we introduced a somewhat standardized format with the advent of our [[Danube River]] test wafer generator.

	~~https://github.com/thesourcerer8/StdCellLib/tree/master/Tech.GF180MCU~~

	== How to use ==		== How to use ==

Leviathan at 01:12, 26 May 2026

2026-05-26T01:12:59Z

← Older revision		Revision as of 01:12, 26 May 2026
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	The LibreSilicon Pad Cell Generator is an extension of the [~~https://wiki.libresilicon.com/LibrePDK~~ LibrePDK] which besides the driver logic also dynamically generates the mixed signal parts needed for over current and static discharge protection and providing the currents needed for doing useful things with an actual physical chip, like driving an LED or a small motor.		The LibreSilicon Pad Cell Generator is an extension of the [[LibrePDK]] which besides the driver logic also dynamically generates the mixed signal parts needed for over current and static discharge protection and providing the currents needed for doing useful things with an actual physical chip, like driving an LED or a small motor.
	[[File:Preliminary First Pad Frame generated.png\|thumb\|First Version of a Padframe of IHP's SG13G2 generated by LibrePDK (Still needs some work)]]		[[File:Preliminary First Pad Frame generated.png\|thumb\|First Version of a Padframe of IHP's SG13G2 generated by LibrePDK (Still needs some work)]]
	<blockquote></blockquote>		<blockquote></blockquote>

Leviathan: /* Electrical Discharge Protection */

2026-05-26T01:04:37Z

Electrical Discharge Protection

← Older revision		Revision as of 01:04, 26 May 2026
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	The whole math is being documented in [[Physics-Based Wire Sizing for I/O Pad Cells]]		The whole math is being documented in [[Physics-Based Wire Sizing for I/O Pad Cells]]

			Subsequently the ngspice analysis and verification of the reverse solved hardware design can be found in [[ESD Verification]]

Leviathan at 00:55, 26 May 2026

2026-05-26T00:55:02Z

← Older revision		Revision as of 00:55, 26 May 2026
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	</syntaxhighlight>You should end up with a set of pad cells dimensioned for 20mA, 30mA, 40mA and 60mA driver strength, plus a demo assembly which looks somewhat like this (still work in progress)		</syntaxhighlight>You should end up with a set of pad cells dimensioned for 20mA, 30mA, 40mA and 60mA driver strength, plus a demo assembly which looks somewhat like this (still work in progress)
	[[File:Preliminary First Pad Frame generated.png\|none\|thumb]]		[[File:Preliminary First Pad Frame generated.png\|none\|thumb]]

			== Electrical Discharge Protection ==
			Since we're calculating backwards from the target values we wanna achieve based on values extracted from ngspice simulations using the SPICE models, it is no wonder that the final ngspice simulation turns out to check out fine for all the pad cells we generate.

			The whole math is being documented in [[Physics-Based Wire Sizing for I/O Pad Cells]]

Leviathan: /* How to use */

2026-05-25T23:59:24Z

How to use

← Older revision		Revision as of 23:59, 25 May 2026
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	== How to use ==		== How to use ==
	The Pad Cell Generator is part of [[LibrePDK]]<syntaxhighlight lang="bash">		The Pad Cell Generator is part of [[LibrePDK]]

			Running the following script within the LibrePDK folder, after following the installation instructions...<syntaxhighlight lang="bash">
	#!/bin/bash		#!/bin/bash
	TECH=SG13G2		TECH=SG13G2
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	uv run librepdk_padcell_generator -t $TECH -v $VOLTAGE -i 20,30,40,60		uv run librepdk_padcell_generator -t $TECH -v $VOLTAGE -i 20,30,40,60
	popd		popd
	</syntaxhighlight>		</syntaxhighlight>You should end up with a set of pad cells dimensioned for 20mA, 30mA, 40mA and 60mA driver strength, plus a demo assembly which looks somewhat like this (still work in progress)
			[[File:Preliminary First Pad Frame generated.png\|none\|thumb]]