X-Authentication-Warning:	delorie.com: mail set sender to geda-user-bounces using -f
X-Recipient:	geda-user AT delorie DOT com
X-Original-DKIM-Signature:	v=1; a=rsa-sha256; c=relaxed/relaxed; d=sbcglobal.net; s=s2048; t=1433881314; bh=DQNuWSqWA25xhbJT3/Xz8ixyhuPgNF1C2TvSgQ1g5mQ=; h=From:Subject:Date:References:In-Reply-To:To:From:Subject; b=T1PH4aY+26wzXWEIRuexNY+5kj87tsAXCbmHYmNaeDay2Rp3P3nkdlK4hszi/ReiewzVFnqN3Z4eQXzOa6Dtb2GAF8tDhIpJpUOlgH5xmeJ+wsF8KDUdmgnZwHkQkCwFXgyRkM6oqU7LgHmR+L8hBdYHWrL6F2BtTXwXG48djg80Ely/wTcxc4p4e2wBhHXdkwCRbN6ff51JbjuPs9MICTQaMzLjdrMCxe+Ez7IndxACvfnb6v5sSZmH+fN+hLkBOcI0XxQnt2SY2KU09X3jEBwHO2H+jKmC1WxHh+I97lsKFnAZKlwM67B6bjFZjV/uGsQU2rmEDEluyyDj0tiwUA==
X-Yahoo-Newman-Id:	728812 DOT 69681 DOT bm AT smtp118 DOT sbc DOT mail DOT gq1 DOT yahoo DOT com
X-Yahoo-Newman-Property:	ymail-3
X-YMail-OSG:	Fy.xRJ8VM1mg4Xh1BQSu4RVFH5r9NoJIgs6v0_Fl6TlDHIm
	JP24KfSOp3poMwVSrbOqkcOJfO9FwUxOaPSTezEapbX6Lw.L1zOmvfljVEK0
	9Dbvysb1mK3hT_QjrdCs_ysKlPUPq2YXaNLsLJ6VuLBRx0VbgcGI9RHXi.zU
	ugohcR31OAcE.HTHQi9rvINrK.FZK3NAf2g9oDOgUzqvkzzoGnQAvfQ6rhMH
	H8kT5tru.gOJhTMRPef6EEeqJb_p15hzi4lv64ULfoLrget0l8lodLEU7jxs
	Rs1ltbDjcdavTFHMazP9uD3UKEMKkJXmhqWVDFWMP3sIyLx9rck5mxWMqYPv
	1e5EVJvkOj_XBEsY_lA1QsV2uJKv3FzCujO9TdhuOADNR1VQROJ2sc7.WgFD
	Jeoqbe6IH9IuOYBhXQhB3g7NBffe3yIPyXhEr5tRv7gO92b.splHzlHhzEwb
	S5pdugmM0wVuGILAUO9cuYjs5ccbf1zA_aagRSZBxu9LbsyEHj4dRIf254qc
	MCdy5tcH465eiA6N6UDKNsXn6GYuR6z8giQF5x2y3lRJUogIY
X-Yahoo-SMTP:	b8jVkbOswBAqZ4BhECp7nxPJUfTGEnEGv_G4qgQeZMeAbA--
From:	"Edward Hennessy (ehennes AT sbcglobal DOT net)" <geda-user AT delorie DOT com>
Mime-Version:	1.0 (1.0)
Subject:	Re: [geda-user] Problem with BGA footprint generator
Message-Id:	<9B9230E1-E6C0-4A6E-8BC6-F56224D32DCC@sbcglobal.net>
Date:	Tue, 9 Jun 2015 13:21:49 -0700
References:	<CALT8Ef7A2XeK6WzZu2DZY_4iKb6V__nV7iZojzc+oP1pDF7qfg AT mail DOT gmail DOT com> <5576E497 DOT 3030707 AT lsol DOT ru> <201506091611 DOT t59GBV3f018294 AT envy DOT delorie DOT com>
In-Reply-To:	<201506091611.t59GBV3f018294@envy.delorie.com>
To:	"geda-user AT delorie DOT com" <geda-user AT delorie DOT com>
X-Mailer:	iPhone Mail (12F70)
X-MIME-Autoconverted:	from quoted-printable to 8bit by delorie.com id t59KLwao020874
Reply-To:	geda-user AT delorie DOT com

After looking around, I've found two different pin numbering schemes. (Could be more.)

When rotating the package so pin A1 is in the upper left, one scheme uses letters for the rows and numbers for the columns. The other uses numbers for the rows and letters for the columns.

Examining datasheets, Linear uses one scheme, and Xilinx uses another.

I need to update my footprint generator.

Cheers,
Ed

Sent from my iPhone

> On Jun 9, 2015, at 9:11 AM, DJ Delorie <dj AT delorie DOT com> wrote:
> 
> 
> I wonder if BGAs have the transistor problem... that the tool is
> correct for some BGAs and wrong for others, and if we fix it it will
> be correct for some BGAs and wrong for others.

- Raw text -