ELogs/Electronics - Revision history

SimonJolly: /* UCL */

2026-04-08T13:47:59Z

UCL

← Older revision		Revision as of 13:47, 8 April 2026
Line 2:		Line 2:

	== UCL ==		== UCL ==

			=== Joe ===

			==== Read out Hamamatsu S17285 with NI-DAQ ====

			* Install LabView on PBT Intel MacBook Pro.
			* Set up NI-DAQ USB6366 to output test patterns on selected pins:
			** Write custom VI to output chosen frequency test patterns (different on each pin).
			** Test output with scope.
			* Replicate Saad's DDC232 slides with detailed signals for communicating with S17285.
			* Communicate with S17285 with NI-DAQ...

	=== Febian ===		=== Febian ===
Line 8:		Line 19:

	* Implement USB-C cable tester using IC KriaDAQ:		* Implement USB-C cable tester using IC KriaDAQ:
	** Set up IPBus communication between PS and PL: talk to '''David Sankey'''.
	** Output test signals from single USB-C port (FW only?): '''Andy Rose/Matt Warren/Erdem Motuk'''.		** Output test signals from single USB-C port (FW only?): '''Andy Rose/Matt Warren/Erdem Motuk'''.
	** Test signals for each channel with ''different'' frequency.		** Test signals for each channel with ''different'' frequency.
			** Use LVDS pairs for 5 differential pairs; check existing firmware for single-ended signals.
	** Measure output with scope.		** Measure output with scope.
			** Set up IPBus communication between PS and PL: talk to '''David Sankey'''.
	** Read output with second USB-C connection.		** Read output with second USB-C connection.
	** Collect output and "display" with PS.		** Collect output and "display" with PS.
Line 24:		Line 36:
	** 4 boards each on 2 connectors.		** 4 boards each on 2 connectors.
	** Extend to 5 USB-C connectors.		** Extend to 5 USB-C connectors.
			* Control readout with web GUI.

			==== Design and Implement firmware for SciFi readout ====

	== Oxford ==		== Oxford ==

SimonJolly at 13:33, 8 April 2026

2026-04-08T13:33:20Z

← Older revision		Revision as of 13:33, 8 April 2026
Line 1:		Line 1:
	Electronic Log for Electronics Development		Electronic Log for Electronics Development

			== UCL ==

			=== Febian ===

			==== Replicate Raspberry Pi/USB104 readout with Kria and IC KriaDAQ board ====

			* Implement USB-C cable tester using IC KriaDAQ:
			** Set up IPBus communication between PS and PL: talk to '''David Sankey'''.
			** Output test signals from single USB-C port (FW only?): '''Andy Rose/Matt Warren/Erdem Motuk'''.
			** Test signals for each channel with ''different'' frequency.
			** Measure output with scope.
			** Read output with second USB-C connection.
			** Collect output and "display" with PS.
			* Migrate USB104 firmware and FTDI C++ code to Kria:
			** Connect DDC board via USB-C: check for power!
			** Send configuration and read back test pattern.
			** Adapt buffer for Kria hardware: '''Andy Rose/Matt Warren'''.
			** Read back live photodiode output from DDC board.
			** Read back live photodiode output from 4 DDC boards.
			* Extend readout to multiple KriaDAQ USB-C connectors.
			** Single board each on 2 connectors.
			** 4 boards each on 2 connectors.
			** Extend to 5 USB-C connectors.

	== Oxford ==		== Oxford ==

AndrewRose at 15:24, 1 September 2025

2025-09-01T15:24:58Z

@@ Line 51: / Line 51: @@
 [mailto:duncan.parker@imperial.ac.uk Duncan Parker]
 === QuADProBe FPGA Upgrade ===
@@ Line 60: / Line 62: @@
 * Kria available off-the-shelf but carrier board needed
 * Imperial to design carrier board with multiple I/O for QuADProBe:
-** [https://imperiallondon-my.sharepoint.com/:f:/g/personal/awr01_ic_ac_uk/EgRdTysqlVBClK6T9m6lPfoBcTIIgF5YVhDBvWghjhb7Ig?e=5%3acq2U8p&at=9&xsdata=MDV8MDJ8cy5qb2xseUB1Y2wuYWMudWt8ZGZkYjUxMzAwYmNlNGQzNjc3NGYwOGRkYzg0OGJiZmV8MWZhZjg4ZmVhOTk4NGM1YjkzYzkyMTBhMTFkOWE1YzJ8MHwwfDYzODg4NjkzNjkzMDgzMjM3NXxVbmtub3dufFRXRnBiR1pzYjNkOGV5SkZiWEIwZVUxaGNHa2lPblJ5ZFdVc0lsWWlPaUl3TGpBdU1EQXdNQ0lzSWxBaU9pSlhhVzR6TWlJc0lrRk9Jam9pVFdGcGJDSXNJbGRVSWpveWZRPT18MHx8fA%3d%3d&sdata=YXh6bkdTZGRqWVhha1Q5VW1OY2pPNWMrRGIxblZjbStUcXVJVTFaTUtURT0%3d Imperial Kria DAQ for QuARC Documents]
+** [https://imperiallondon-my.sharepoint.com/:f:/r/personal/awr01_ic_ac_uk/Documents/KriaDAQ Imperial One-drive folder for Kria DAQ Documents]
-** [https://imperiallondon-my.sharepoint.com/:p:/g/personal/awr01_ic_ac_uk/EY7mhF35mrpNpBUfO3pgTWYBPzMu3WOi93Z0Pi--k1h6TA?xsdata=MDV8MDJ8cy5qb2xseUB1Y2wuYWMudWt8ZDc4NTM3Mjk5NmNiNDkzNThhYmYwOGRkZDUyMWZkMmZ8MWZhZjg4ZmVhOTk4NGM1YjkzYzkyMTBhMTFkOWE1YzJ8MHwwfDYzODkwMTA2NDE3NTY4MjE5OXxVbmtub3dufFRXRnBiR1pzYjNkOGV5SkZiWEIwZVUxaGNHa2lPblJ5ZFdVc0lsWWlPaUl3TGpBdU1EQXdNQ0lzSWxBaU9pSlhhVzR6TWlJc0lrRk9Jam9pVFdGcGJDSXNJbGRVSWpveWZRPT18MHx8fA%3d%3d&sdata=ODVLOGhtTFplUU9xaWpFazNqZkNsekNjWXVKM3EyR0V1N2poc3lxNHdQZz0%3d Rough board layout (PPTX)]
+** [https://imperiallondon-my.sharepoint.com/:p:/r/personal/awr01_ic_ac_uk/Documents/KriaDAQ/QUARC%20evolution.pptx?d=w174b6813c4c74a809a787aaea406ed28 Evolution of QuARC Electronics (PPTX)]
-** [https://imperiallondon-my.sharepoint.com/:p:/r/personal/awr01_ic_ac_uk/Documents/KriaDAQ/QUARC%20evolution.pptx?d=w174b6813c4c74a809a787aaea406ed28&csf=1&web=1&e=luRiE3&xsdata=MDV8MDJ8cy5qb2xseUB1Y2wuYWMudWt8ZDc4NTM3Mjk5NmNiNDkzNThhYmYwOGRkZDUyMWZkMmZ8MWZhZjg4ZmVhOTk4NGM1YjkzYzkyMTBhMTFkOWE1YzJ8MHwwfDYzODkwMTA2NDE3NTY2OTcwMXxVbmtub3dufFRXRnBiR1pzYjNkOGV5SkZiWEIwZVUxaGNHa2lPblJ5ZFdVc0lsWWlPaUl3TGpBdU1EQXdNQ0lzSWxBaU9pSlhhVzR6TWlJc0lrRk9Jam9pVFdGcGJDSXNJbGRVSWpveWZRPT18MHx8fA%3d%3d&sdata=MlBJaE9ueW4yQkdiZnNBbE8xTm9GSXBkdEpORHNyYWlPbGdRQS9SVlI1TT0%3d Evolution of QuARC Electronics (PPTX)]
+** [https://imperiallondon-my.sharepoint.com/:w:/r/personal/awr01_ic_ac_uk/Documents/KriaDAQ/Specification.docx?d=w07d339959a8449428d3d68664ff5b519 SPECIFICATION DOCUMENT (DOCX)]

SimonJolly at 16:56, 11 August 2025

2025-08-11T16:56:28Z

← Older revision		Revision as of 16:56, 11 August 2025
Line 60:		Line 60:
	* Kria available off-the-shelf but carrier board needed		* Kria available off-the-shelf but carrier board needed
	* Imperial to design carrier board with multiple I/O for QuADProBe:		* Imperial to design carrier board with multiple I/O for QuADProBe:
			** [https://imperiallondon-my.sharepoint.com/:f:/g/personal/awr01_ic_ac_uk/EgRdTysqlVBClK6T9m6lPfoBcTIIgF5YVhDBvWghjhb7Ig?e=5%3acq2U8p&at=9&xsdata=MDV8MDJ8cy5qb2xseUB1Y2wuYWMudWt8ZGZkYjUxMzAwYmNlNGQzNjc3NGYwOGRkYzg0OGJiZmV8MWZhZjg4ZmVhOTk4NGM1YjkzYzkyMTBhMTFkOWE1YzJ8MHwwfDYzODg4NjkzNjkzMDgzMjM3NXxVbmtub3dufFRXRnBiR1pzYjNkOGV5SkZiWEIwZVUxaGNHa2lPblJ5ZFdVc0lsWWlPaUl3TGpBdU1EQXdNQ0lzSWxBaU9pSlhhVzR6TWlJc0lrRk9Jam9pVFdGcGJDSXNJbGRVSWpveWZRPT18MHx8fA%3d%3d&sdata=YXh6bkdTZGRqWVhha1Q5VW1OY2pPNWMrRGIxblZjbStUcXVJVTFaTUtURT0%3d Imperial Kria DAQ for QuARC Documents]
	** [https://imperiallondon-my.sharepoint.com/:p:/g/personal/awr01_ic_ac_uk/EY7mhF35mrpNpBUfO3pgTWYBPzMu3WOi93Z0Pi--k1h6TA?xsdata=MDV8MDJ8cy5qb2xseUB1Y2wuYWMudWt8ZDc4NTM3Mjk5NmNiNDkzNThhYmYwOGRkZDUyMWZkMmZ8MWZhZjg4ZmVhOTk4NGM1YjkzYzkyMTBhMTFkOWE1YzJ8MHwwfDYzODkwMTA2NDE3NTY4MjE5OXxVbmtub3dufFRXRnBiR1pzYjNkOGV5SkZiWEIwZVUxaGNHa2lPblJ5ZFdVc0lsWWlPaUl3TGpBdU1EQXdNQ0lzSWxBaU9pSlhhVzR6TWlJc0lrRk9Jam9pVFdGcGJDSXNJbGRVSWpveWZRPT18MHx8fA%3d%3d&sdata=ODVLOGhtTFplUU9xaWpFazNqZkNsekNjWXVKM3EyR0V1N2poc3lxNHdQZz0%3d Rough board layout (PPTX)]		** [https://imperiallondon-my.sharepoint.com/:p:/g/personal/awr01_ic_ac_uk/EY7mhF35mrpNpBUfO3pgTWYBPzMu3WOi93Z0Pi--k1h6TA?xsdata=MDV8MDJ8cy5qb2xseUB1Y2wuYWMudWt8ZDc4NTM3Mjk5NmNiNDkzNThhYmYwOGRkZDUyMWZkMmZ8MWZhZjg4ZmVhOTk4NGM1YjkzYzkyMTBhMTFkOWE1YzJ8MHwwfDYzODkwMTA2NDE3NTY4MjE5OXxVbmtub3dufFRXRnBiR1pzYjNkOGV5SkZiWEIwZVUxaGNHa2lPblJ5ZFdVc0lsWWlPaUl3TGpBdU1EQXdNQ0lzSWxBaU9pSlhhVzR6TWlJc0lrRk9Jam9pVFdGcGJDSXNJbGRVSWpveWZRPT18MHx8fA%3d%3d&sdata=ODVLOGhtTFplUU9xaWpFazNqZkNsekNjWXVKM3EyR0V1N2poc3lxNHdQZz0%3d Rough board layout (PPTX)]
	** [https://imperiallondon-my.sharepoint.com/:p:/r/personal/awr01_ic_ac_uk/Documents/KriaDAQ/QUARC%20evolution.pptx?d=w174b6813c4c74a809a787aaea406ed28&csf=1&web=1&e=luRiE3&xsdata=MDV8MDJ8cy5qb2xseUB1Y2wuYWMudWt8ZDc4NTM3Mjk5NmNiNDkzNThhYmYwOGRkZDUyMWZkMmZ8MWZhZjg4ZmVhOTk4NGM1YjkzYzkyMTBhMTFkOWE1YzJ8MHwwfDYzODkwMTA2NDE3NTY2OTcwMXxVbmtub3dufFRXRnBiR1pzYjNkOGV5SkZiWEIwZVUxaGNHa2lPblJ5ZFdVc0lsWWlPaUl3TGpBdU1EQXdNQ0lzSWxBaU9pSlhhVzR6TWlJc0lrRk9Jam9pVFdGcGJDSXNJbGRVSWpveWZRPT18MHx8fA%3d%3d&sdata=MlBJaE9ueW4yQkdiZnNBbE8xTm9GSXBkdEpORHNyYWlPbGdRQS9SVlI1TT0%3d Evolution of QuARC Electronics (PPTX)]		** [https://imperiallondon-my.sharepoint.com/:p:/r/personal/awr01_ic_ac_uk/Documents/KriaDAQ/QUARC%20evolution.pptx?d=w174b6813c4c74a809a787aaea406ed28&csf=1&web=1&e=luRiE3&xsdata=MDV8MDJ8cy5qb2xseUB1Y2wuYWMudWt8ZDc4NTM3Mjk5NmNiNDkzNThhYmYwOGRkZDUyMWZkMmZ8MWZhZjg4ZmVhOTk4NGM1YjkzYzkyMTBhMTFkOWE1YzJ8MHwwfDYzODkwMTA2NDE3NTY2OTcwMXxVbmtub3dufFRXRnBiR1pzYjNkOGV5SkZiWEIwZVUxaGNHa2lPblJ5ZFdVc0lsWWlPaUl3TGpBdU1EQXdNQ0lzSWxBaU9pSlhhVzR6TWlJc0lrRk9Jam9pVFdGcGJDSXNJbGRVSWpveWZRPT18MHx8fA%3d%3d&sdata=MlBJaE9ueW4yQkdiZnNBbE8xTm9GSXBkdEpORHNyYWlPbGdRQS9SVlI1TT0%3d Evolution of QuARC Electronics (PPTX)]

SimonJolly: /* Imperial */

2025-08-11T16:17:37Z

Imperial

← Older revision		Revision as of 16:17, 11 August 2025
Line 60:		Line 60:
	* Kria available off-the-shelf but carrier board needed		* Kria available off-the-shelf but carrier board needed
	* Imperial to design carrier board with multiple I/O for QuADProBe:		* Imperial to design carrier board with multiple I/O for QuADProBe:
			** [https://imperiallondon-my.sharepoint.com/:p:/g/personal/awr01_ic_ac_uk/EY7mhF35mrpNpBUfO3pgTWYBPzMu3WOi93Z0Pi--k1h6TA?xsdata=MDV8MDJ8cy5qb2xseUB1Y2wuYWMudWt8ZDc4NTM3Mjk5NmNiNDkzNThhYmYwOGRkZDUyMWZkMmZ8MWZhZjg4ZmVhOTk4NGM1YjkzYzkyMTBhMTFkOWE1YzJ8MHwwfDYzODkwMTA2NDE3NTY4MjE5OXxVbmtub3dufFRXRnBiR1pzYjNkOGV5SkZiWEIwZVUxaGNHa2lPblJ5ZFdVc0lsWWlPaUl3TGpBdU1EQXdNQ0lzSWxBaU9pSlhhVzR6TWlJc0lrRk9Jam9pVFdGcGJDSXNJbGRVSWpveWZRPT18MHx8fA%3d%3d&sdata=ODVLOGhtTFplUU9xaWpFazNqZkNsekNjWXVKM3EyR0V1N2poc3lxNHdQZz0%3d Rough board layout (PPTX)]
			** [https://imperiallondon-my.sharepoint.com/:p:/r/personal/awr01_ic_ac_uk/Documents/KriaDAQ/QUARC%20evolution.pptx?d=w174b6813c4c74a809a787aaea406ed28&csf=1&web=1&e=luRiE3&xsdata=MDV8MDJ8cy5qb2xseUB1Y2wuYWMudWt8ZDc4NTM3Mjk5NmNiNDkzNThhYmYwOGRkZDUyMWZkMmZ8MWZhZjg4ZmVhOTk4NGM1YjkzYzkyMTBhMTFkOWE1YzJ8MHwwfDYzODkwMTA2NDE3NTY2OTcwMXxVbmtub3dufFRXRnBiR1pzYjNkOGV5SkZiWEIwZVUxaGNHa2lPblJ5ZFdVc0lsWWlPaUl3TGpBdU1EQXdNQ0lzSWxBaU9pSlhhVzR6TWlJc0lrRk9Jam9pVFdGcGJDSXNJbGRVSWpveWZRPT18MHx8fA%3d%3d&sdata=MlBJaE9ueW4yQkdiZnNBbE8xTm9GSXBkdEpORHNyYWlPbGdRQS9SVlI1TT0%3d Evolution of QuARC Electronics (PPTX)]

	==== IO specification====		==== IO specification====

SimonJolly: /* Imperial */

2025-08-11T16:12:22Z

Imperial

← Older revision		Revision as of 16:12, 11 August 2025
Line 64:		Line 64:

	* Connections for AMD Kria K26 system-on-module		* Connections for AMD Kria K26 system-on-module
	* 11 ~~“USB~~-C” IO connector		* 11 "USB-C" IO connector
	** Vertical right-angle (~~“flag”~~) connector		** Vertical right-angle ("flag") connector
	** 5x differential-pairs, at-least one connected to HP clock-capable pins		** 5x differential-pairs, at-least one connected to HP clock-capable pins
	** 4x single-ended, to 3v3 HD pins		** 4x single-ended, to 3v3 HD pins
Line 75:		Line 75:
	** 20V power - power-enable, O/V and O/C protection		** 20V power - power-enable, O/V and O/C protection
	* GbE via RJ45		* GbE via RJ45
	* M.2 SATA disk		* 2 x M.2 SATA disk
	** Or NVMe disk? IIRC can be made resistor-changeable to PCIe?		** M key (B key compatible - assembly-time choice of connector)
	* M~~.2 PCIe?~~		** SATA SSD or 2-lane Gen-2 PCIe (requires polarity flip of RX in Kria config)
	** A+E key~~? M~~ key?		** 2230, 2242, 2260 & 2280 mounting holes
	** 2 lane PCIe
	* uSD card		* uSD card
	* RPI5-compatable PCIe		* RPI5-compatable PCIe
	** 16-pin, single-sided, 0.5mm pitch FFC		** 16-pin, single-sided, 0.5mm pitch FFC
	** Connect to PL GTH transceivers		** Connect to PL GTH transceivers
	* 4-~~pin fan~~-header?		* SFP cage & connector
			** Connect to PL GTH transceivers
			** Do-not-fit on initial design
			* Debug header
			** USB-C connector → Breakout board
			** PS Switches
			** PS LEDs
			** PS UART

	==== Power specification ====		==== Power specification ====
Line 91:		Line 97:
	** Requires negotiation		** Requires negotiation
	* Barrel-jack fall-back power		* Barrel-jack fall-back power
	* Hold-up caps?		* Hold-up caps
			* 2-pin fan-header

	==== Mechanical specification ====		==== Mechanical specification ====

SimonJolly: /* Oxford */

2025-08-11T16:08:28Z

Oxford

← Older revision		Revision as of 16:08, 11 August 2025
Line 27:		Line 27:
	** Potential for USB-C PD to drop out when voltage renegotiated?		** Potential for USB-C PD to drop out when voltage renegotiated?

	=== DDC Photodiode Board Rev.F ===		=== DDC Photodiode Board Rev.G ===

	'''Upon completion of power distribution board'''		'''Upon completion of power distribution board'''

			* Return Rev.F boards and ZMOD boards to be fixed: &check;
	* Remove '''RESET''' connection from '''CC2''' pin on '''all''' DDC board USB-C connections		* Remove '''RESET''' connection from '''CC2''' pin on '''all''' DDC board USB-C connections
	* Resize DDC board to accept [https://www.hamamatsu.com/jp/en/product/optical-sensors/photodiodes/si-photodiode-array/si-photodiode-array/S12362-021.html Hamamatsu S12362 16-element photodiode array] in place of [https://www.hamamatsu.com/jp/en/product/optical-sensors/photodiodes/si-photodiodes/S12915-16R.html Hamamatsu S12915-16R single photodiodes]		* Resize DDC board to accept [https://www.hamamatsu.com/jp/en/product/optical-sensors/photodiodes/si-photodiode-array/si-photodiode-array/S12362-021.html Hamamatsu S12362 16-element photodiode array] in place of [https://www.hamamatsu.com/jp/en/product/optical-sensors/photodiodes/si-photodiodes/S12915-16R.html Hamamatsu S12915-16R single photodiodes]

SimonJolly at 16:11, 28 July 2025

2025-07-28T16:11:10Z

← Older revision		Revision as of 16:11, 28 July 2025
Line 100:		Line 100:
	* All connector on one edge?		* All connector on one edge?
	** Except RPI PCIe (and fan-header if used)		** Except RPI PCIe (and fan-header if used)

	==== To-do ====		==== To-do ====

SimonJolly at 16:10, 28 July 2025

2025-07-28T16:10:41Z

← Older revision		Revision as of 16:10, 28 July 2025
Line 68:		Line 68:
	** 4x single-ended, to 3v3 HD pins		** 4x single-ended, to 3v3 HD pins
	** 20V power - power-enable, O/V and O/C protection		** 20V power - power-enable, O/V and O/C protection

	* 1 “USB-C” IO connector		* 1 “USB-C” IO connector
	** Vertical right-angle (“flag”) connector		** Vertical right-angle (“flag”) connector
Line 75:		Line 74:
	** 20V power - power-enable, O/V and O/C protection		** 20V power - power-enable, O/V and O/C protection
	* GbE via RJ45		* GbE via RJ45

	* M.2 SATA disk		* M.2 SATA disk
	** Or NVMe disk? IIRC can be made resistor-changeable to PCIe?		** Or NVMe disk? IIRC can be made resistor-changeable to PCIe?

	* M.2 PCIe?		* M.2 PCIe?
	** A+E key? M key?		** A+E key? M key?
	** 2 lane PCIe		** 2 lane PCIe

	* uSD card		* uSD card
	* RPI5-compatable PCIe		* RPI5-compatable PCIe
Line 92:		Line 88:

	* USB-C power connection – 5A @ 20V		* USB-C power connection – 5A @ 20V
	** ~~gvRequires~~ negotiation		** Requires negotiation
	* Barrel-jack fall-back power		* Barrel-jack fall-back power
	* Hold-up caps?		* Hold-up caps?
Line 106:		Line 102:

	==== To-do ====		==== To-do ====

	* Swap USBs to flag-type		* Swap USBs to flag-type
	* Make power switches disabled by default (pull-up on En# lines)		* Make power switches disabled by default (pull-up on En# lines)
	* I2C for power negotiator		* I2C for power negotiator



	** 20V USB-C PD/DC power input		** 20V USB-C PD/DC power input
	** 11 x USB-C sockets connected to PL for detector interface		** 11 x USB-C sockets connected to PL for detector interface

SimonJolly at 16:09, 28 July 2025

2025-07-28T16:09:43Z

← Older revision		Revision as of 16:09, 28 July 2025
Line 46:		Line 46:

	== Imperial ==		== Imperial ==

			[mailto:andrew.rose01@imperial.ac.uk Andy Rose]

			[mailto:duncan.parker@imperial.ac.uk Duncan Parker]

			=== QuADProBe FPGA Upgrade ===

			* QuADProBe QAD to be upgraded from USB104+Raspberry Pi to Kria:
			** [https://www.amd.com/en/products/system-on-modules/kria/k26.html AMD Kria K26 SoM]
			** [https://docs.amd.com/r/en-US/ds987-k26-som/ Kria K26 SoM Data Sheet]
			** [https://www.amd.com/en/products/system-on-modules/kria/k26/kv260-vision-starter-kit.html Kria KV260 AI Vision Starter Kit]
			* Kria available off-the-shelf but carrier board needed
			* Imperial to design carrier board with multiple I/O for QuADProBe:

			==== IO specification====

			* Connections for AMD Kria K26 system-on-module
			* 11 “USB-C” IO connector
			** Vertical right-angle (“flag”) connector
			** 5x differential-pairs, at-least one connected to HP clock-capable pins
			** 4x single-ended, to 3v3 HD pins
			** 20V power - power-enable, O/V and O/C protection

			* 1 “USB-C” IO connector
			** Vertical right-angle (“flag”) connector
			** 3x differential-pairs, connected to HP global-clock pins
			** 4x single-ended, to 3v3 HD pins
			** 20V power - power-enable, O/V and O/C protection
			* GbE via RJ45

			* M.2 SATA disk
			** Or NVMe disk? IIRC can be made resistor-changeable to PCIe?

			* M.2 PCIe?
			** A+E key? M key?
			** 2 lane PCIe

			* uSD card
			* RPI5-compatable PCIe
			** 16-pin, single-sided, 0.5mm pitch FFC
			** Connect to PL GTH transceivers
			* 4-pin fan-header?

			==== Power specification ====

			* USB-C power connection – 5A @ 20V
			** gvRequires negotiation
			* Barrel-jack fall-back power
			* Hold-up caps?

			==== Mechanical specification ====

			* As low-profile as possible
			* Not overly constrained in lateral dimensions – as compact as reasonably possible
			* Mounting holes
			* Heatsink?
			* All connector on one edge?
			** Except RPI PCIe (and fan-header if used)

			==== To-do ====
			* Swap USBs to flag-type
			* Make power switches disabled by default (pull-up on En# lines)
			* I2C for power negotiator



			** 20V USB-C PD/DC power input
			** 11 x USB-C sockets connected to PL for detector interface