From 51169b953116701507a503028de7b6c6f63f8caf Mon Sep 17 00:00:00 2001 From: Staf Verhaegen Date: Sat, 9 May 2020 11:12:40 +0200 Subject: [PATCH] Re: [libre-riscv-dev] Pinout, interfaces, Rudi, and Raptor --- c1/eae4754bbd083de08f6e261e875eb8929e4b74 | 108 ++++++++++++++++++++++ 1 file changed, 108 insertions(+) create mode 100644 c1/eae4754bbd083de08f6e261e875eb8929e4b74 diff --git a/c1/eae4754bbd083de08f6e261e875eb8929e4b74 b/c1/eae4754bbd083de08f6e261e875eb8929e4b74 new file mode 100644 index 0000000..7ff02e2 --- /dev/null +++ b/c1/eae4754bbd083de08f6e261e875eb8929e4b74 @@ -0,0 +1,108 @@ +Return-path: +Envelope-to: publicinbox@libre-riscv.org +Delivery-date: Sat, 09 May 2020 10:12:49 +0100 +Received: from localhost ([::1] helo=libre-riscv.org) + by libre-soc.org with esmtp (Exim 4.89) + (envelope-from ) + id 1jXLXM-0005eI-MO; Sat, 09 May 2020 10:12:48 +0100 +Received: from vps2.stafverhaegen.be ([85.10.201.15]) + by libre-soc.org with esmtp (Exim 4.89) + (envelope-from ) id 1jXLXK-0005eC-RZ + for libre-riscv-dev@lists.libre-riscv.org; Sat, 09 May 2020 10:12:46 +0100 +Received: from hpdc7800 (hpdc7800 [10.0.0.1]) + by vps2.stafverhaegen.be (Postfix) with ESMTP id 0BEDB11C04F6 + for ; + Sat, 9 May 2020 11:12:46 +0200 (CEST) +Message-ID: <792ac37b0c72350337f07c758d51a24eaa9ac532.camel@fibraservi.eu> +From: Staf Verhaegen +To: libre-riscv-dev@lists.libre-riscv.org +Date: Sat, 09 May 2020 11:12:40 +0200 +In-Reply-To: <3BD26F5C-BB6D-4011-89E6-EC06215DEDEA@gatech.edu> +References: <3BD26F5C-BB6D-4011-89E6-EC06215DEDEA@gatech.edu> +Organization: FibraServi bvba +X-Mailer: Evolution 3.28.5 (3.28.5-8.el7) +Mime-Version: 1.0 +X-Content-Filtered-By: Mailman/MimeDel 2.1.23 +Subject: Re: [libre-riscv-dev] Pinout, interfaces, Rudi, and Raptor +X-BeenThere: libre-riscv-dev@lists.libre-riscv.org +X-Mailman-Version: 2.1.23 +Precedence: list +List-Id: Libre-RISCV General Development + +List-Unsubscribe: , + +List-Archive: +List-Post: +List-Help: +List-Subscribe: , + +Reply-To: Libre-RISCV General Development + +Content-Type: multipart/mixed; boundary="===============1441781585780467197==" +Errors-To: libre-riscv-dev-bounces@lists.libre-riscv.org +Sender: "libre-riscv-dev" + + +--===============1441781585780467197== +Content-Type: multipart/signed; micalg="pgp-sha1"; protocol="application/pgp-signature"; + boundary="=-q7g7wYzd/YlocVdASqQr" + + +--=-q7g7wYzd/YlocVdASqQr +Content-Type: text/plain; charset="UTF-8" +Content-Transfer-Encoding: quoted-printable + +Yehowshua schreef op vr 08-05-2020 om 10:20 [-0400]: +> Hello Luke, So I see we have some pinout sdefine here. +> https://libre-soc.org/shakti/m_class/pinouts/ +>=20 +> My suggestion is to drop the pinmux for now. We should probably update th= +at page(or create a similar page) to reflect what we=E2=80=99re targeting f= +or October. +> IIRC, we=E2=80=99re targeting QFP. I don=E2=80=99t see the dimensions or = +form factor we=E2=80=99re targeting listed there however. We should talk ab= +out that. +> Also, talked with Tim and SDR could work for the first SBC. LiteX also su= +pports SDR which is good for us as it doesn=E2=80=99t require a PHY like DD= +R making it simpler. + +You refer to a first SBC preferably low-cost. The October prototype tape-ou= +t will not be cost-effective for that. It is a multi-project wafer. You can= + order extra wafers but it does mean that the cost of that wafer is divided= + over much less devices; meaning the cost will be around $32 per chip and s= +ome of them will not be functional; in microelectrics you never have 100% y= +ield. Also I think there is limit on only be able to get at most 1000 chips= + this way. + +If you want lower cost per unit you need to go for a full mask with a so-ca= +lled engineering lot of 12 wafers. This will have a high startup cost. A fi= +rst crude estimation is between $70000 and $75000. This give a few thousand= + of chips; exact number depends on the size of the chip. An extra engineeri= +ng lot of 12 wafers will be around $18000. +For this it means you will need to a new tape-out so you can add extra peri= +pherals that were not on the prototype tape-out. + +greets, +Staf. + + +--=-q7g7wYzd/YlocVdASqQr-- + + + +--===============1441781585780467197== +Content-Type: text/plain; charset="utf-8" +MIME-Version: 1.0 +Content-Transfer-Encoding: base64 +Content-Disposition: inline + +X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGlicmUtcmlz +Y3YtZGV2IG1haWxpbmcgbGlzdApsaWJyZS1yaXNjdi1kZXZAbGlzdHMubGlicmUtcmlzY3Yub3Jn +Cmh0dHA6Ly9saXN0cy5saWJyZS1yaXNjdi5vcmcvbWFpbG1hbi9saXN0aW5mby9saWJyZS1yaXNj +di1kZXYK + +--===============1441781585780467197==-- + + + -- 2.30.2