OCuLink Riser for the Supermicro AIOM Slot - video/oculink-riser-tour.vtt

Overview Files Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

main

John Lauer Videos: sentence-exact captions (VTT+SRT), no dead air; new 3D tour of the card and its component pages 045ee35 7d ago

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142

WEBVTT

00:00:00.000 --> 00:00:03.354
Here is the finished card in Adom's 3D
viewer:

00:00:03.354 --> 00:00:07.656
seventy six by one hundred fifteen
millimeters, six layers,

00:00:07.656 --> 00:00:10.937
cut to the OCP 3.0 small form factor
outline.

00:00:11.200 --> 00:00:15.952
Along the outer edge sit four Amphenol
OCuLink receptacles,

00:00:15.952 --> 00:00:18.046
one for each PCIe x4 port.

00:00:18.300 --> 00:00:21.973
There was no Adom component page for this
connector, so Claude made one.

00:00:22.093 --> 00:00:23.217
We will look at it in a moment.

00:00:23.467 --> 00:00:25.260
Just behind the connectors,

00:00:25.260 --> 00:00:29.977
a TI ESD array guards each port's reset
and clock lines against static.

00:00:30.233 --> 00:00:32.215
On the left edge is the control logic.

00:00:32.335 --> 00:00:36.624
The SN74LVC125 buffers each port's reset
line,

00:00:36.624 --> 00:00:42.497
and the TPS3808 tells the server when the
card's power is good.

00:00:42.733 --> 00:00:45.300
This shift register is the OCP scan chain,

00:00:45.300 --> 00:00:49.090
which the server reads for the card's
present and status bits.

00:00:49.210 --> 00:00:54.690
Next to it, an EEPROM holds the card's
identity, the second new Adom component
page.

00:00:54.933 --> 00:00:57.419
At the other end are the gold fingers:

00:00:57.419 --> 00:01:01.475
one hundred sixty eight contacts that plug
into the AIOM slot.

00:01:01.733 --> 00:01:07.029
Underneath, the silkscreen names the card,
says to set the slot to 4x4 in the BIOS,

00:01:07.029 --> 00:01:08.879
and points back to this page.

00:01:09.133 --> 00:01:11.724
That is the whole card: passive, four
ports,

00:01:11.724 --> 00:01:14.491
and ready to order from the files on this
page.

00:01:14.733 --> 00:01:16.678
Now the two component pages Claude made.

00:01:16.798 --> 00:01:19.130
First, the Amphenol OCuLink receptacle,

00:01:19.130 --> 00:01:22.838
with its Mouser and DigiKey part numbers
so it can be ordered.

00:01:23.100 --> 00:01:26.974
Its 3D model is a simplified body built
from Amphenol's drawing,

00:01:26.974 --> 00:01:30.183
because the real model sits behind an
Amphenol login.

00:01:30.433 --> 00:01:34.496
The page carries the full pinout from the
SFF-9402 spec:

00:01:34.496 --> 00:01:39.357
the transmit and receive pairs, the
reference clock, and the reset.

00:01:39.600 --> 00:01:43.568
And a KiCad symbol and footprint drawn
from Amphenol's land pattern,

00:01:43.568 --> 00:01:45.318
ready for anyone's next board.

00:01:45.567 --> 00:01:48.676
A provenance section lists where every
file came from,

00:01:48.676 --> 00:01:51.267
and says plainly which parts were made by
AI.

00:01:51.533 --> 00:01:57.089
Second, the ROHM 64 kbit EEPROM that
stores the card's identity for the server.

00:01:57.333 --> 00:02:03.321
A standard SOP-8 package, with a generic
body from KiCad's 3D library.

00:02:03.567 --> 00:02:06.034
Every pin is listed from ROHM's datasheet,

00:02:06.034 --> 00:02:08.912
including the address pins and the write
protect.

00:02:09.167 --> 00:02:10.735
Plus its symbol and footprint.

00:02:10.855 --> 00:02:15.065
Both pages are public, so the next design
that needs these parts can just use them.