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Thu, 9 Mar 2023 02:55:35 +0000 Date: Thu, 9 Mar 2023 02:55:33 +0000 (UTC) From: Fred van Kempen To: "craig@sbc-85.com" Message-ID: <249019568.746674.1678330533219@mail.yahoo.com> In-Reply-To: <0a7c01d95231$7e567250$7b0356f0$@sbc-85.com> References: <490836865.1059725.1677551395576@mail.yahoo.com> <1034063010.1082804.1677554719166@mail.yahoo.com> <066a01d9507b$879070d0$96b15270$@sbc-85.com> <872234415.123302.1678156749750@mail.yahoo.com> <0caf01d9512a$ae9b7440$0bd25cc0$@sbc-85.com> <1678012834.354643.1678223639654@mail.yahoo.com> <028b01d95164$fd8d0fc0$f8a72f40$@sbc-85.com> <643533015.475917.1678266223718@mail.yahoo.com> <07c001d951ff$5179afe0$f46d0fa0$@sbc-85.com> <2054311851.742442.1678328367219@mail.yahoo.com> <0a7c01d95231$7e567250$7b0356f0$@sbc-85.com> Subject: Re: summary MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_746673_2073374748.1678330533218" X-Mailer: WebService/1.1.21284 YMailNorrin Content-Length: 4057 X-Spam-Status: No, score=-0.2 X-Spam-Score: -1 X-Spam-Bar: / X-Spam-Flag: NO ------=_Part_746673_2073374748.1678330533218 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Craig: Its my first time "at the desk" since I turned blind 16 months ago, so its = taking me a whileto get back in the saddle.=C2=A0 That said, looks like I h= aven't forgotten ;-) Yeah, I could always add more elcos (or, rather, space for them) between th= e slots, inparallel with the standard ones.=C2=A0 I chose the 2.5mm x 5.00m= m package for these, with(at 10V) will allow you up to 22u and/or 47u.=C2= =A0 We can allow for up to 3 per connectorper side, so, per connector, up t= o 6x 47u .. :P I have no problem with adding pins for a fast bus, but "buffering" CLK with= GND linesaround it would make the old and new pinouts incompatible.=C2=A0 = Let's keep that in theback burner for now.=C2=A0 My backplane is 4-layer an= yway, with all signal traces in themiddle two layers, so we MAY get by if t= hat shields shit enough... I hope to have something to show you later tonight- working on those 27-pin= busbreakouts now. Oh, and no, I have not used those RPs yet.=C2=A0 I dont think you want to t= erminate a clockline like that. Fred =C2=A0 =20 ------=_Part_746673_2073374748.1678330533218 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Craig:

Its= my first time "at the desk" since I turned blind 16 months ago, so its tak= ing me a while
to get back in t= he saddle.  That said, looks like I haven't forgotten ;-)

Yeah, I could always add more elcos (or, rather, space for them) betw= een the slots, in
parallel with= the standard ones.  I chose the 2.5mm x 5.00mm package for these, wit= h
(at 10V) will allow you up to= 22u and/or 47u.  We can allow for up to 3 per connector
per side, so, per connector, up to 6x 47u ..= :P

I have no problem with adding pins for a fast bus, bu= t "buffering" CLK with GND lines
around it would make the old and new pinouts incompatible.  Let's ke= ep that in the
back burner for = now.  My backplane is 4-layer anyway, with all signal traces in the
middle two layers, so we MAY get = by if that shields shit enough...

I hope to have somethin= g to show you later tonight- working on those 27-pin bus
breakouts now.

Oh, and no, I h= ave not used those RPs yet.  I dont think you want to terminate a cloc= k
line like that.

Fred

 

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