From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from thsmsgxrt11p.thalesgroup.com (thsmsgxrt11p.thalesgroup.com [192.54.144.134]) by ozlabs.org (Postfix) with ESMTP id E1B4E67B32 for ; Tue, 4 Jul 2006 18:12:23 +1000 (EST) Received: from thsmsgirt22p.corp.thales (unknown [10.33.231.6]) by thsmsgxrt11p.thalesgroup.com (Postfix) with ESMTP id 7A97E3C10B for ; Tue, 4 Jul 2006 10:12:20 +0200 (CEST) Received: from thsmsgiav13p.corp.thales (10.33.231.33) by thsmsgirt22p.corp.thales (7.2.055.4) id 44447C9500EDE14A for linuxppc-embedded@ozlabs.org; Tue, 4 Jul 2006 10:12:17 +0200 Received: from cnfplex.tbm.fr.thales (unknown [10.33.13.187]) by thsmsgirt12p.corp.thales (Postfix) with ESMTP id 634393C01F for ; Tue, 4 Jul 2006 10:12:20 +0200 (CEST) Received: from [178.1.60.47] (178.1.60.47) by cnfplex.tbm.fr.thales (NPlex 6.5.026) id 44A4B6F0000036BF for linuxppc-embedded@ozlabs.org; Tue, 4 Jul 2006 10:12:20 +0200 Message-ID: <44AA22E3.3050701@thales-bm.com> Date: Tue, 04 Jul 2006 10:12:19 +0200 From: "hubert.loewenguth" MIME-Version: 1.0 To: linuxppc-embedded@ozlabs.org Subject: what is the MPC8260 spi maximum rate ? Content-Type: multipart/mixed; boundary="------------030502000908070107010207" List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This is a multi-part message in MIME format. --------------030502000908070107010207 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Hi everybody I have a question about the spi on the MPC8260. I have written a driver for this controller but there is something in the MPC8260 documentation I don't understand: It is written in MPC8260 documentation (SPI chapter) : " The maximum sustained data rate that the SPI supports is SYSTEMCLK/50. However the spi can transfer a single character at much higher rates (SYSTEMCLK/4 in master mode)". My really stupid question is ...... what is "SYSTEMCLK" ??????? is it the BRG_CLK ? the CPM_CLK or the CPU_CLK ???? Seeing that in the SPMODE register, the maximum SPI CLK possible is BRG_CLK/4, I imagine that this "SYSTEMCLK" is BRG_CLK, but this looks very strange ..... This question is quite stupid but very important for me in order to know if that controller permit to exchange data with one of our extention board at 1.2 MHz. Anybody knows ? Thanks very much for any help . --------------030502000908070107010207 Content-Type: text/x-vcard; charset=utf-8; name="hubert.loewenguth.vcf" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="hubert.loewenguth.vcf" begin:vcard fn:Hubert Loewenguth n:Loewenguth;Hubert org:Thales Broadcast & Multimedia adr:;;1 rue de l'hautil;Conflans Ste Honorine;;78700;France email;internet:hubert.loewenguth@thales-bm.com title:Software Engineer tel;work:01-34-90-37-56 x-mozilla-html:TRUE version:2.1 end:vcard --------------030502000908070107010207--