From mboxrd@z Thu Jan 1 00:00:00 1970 To: laurent.pinchart@capflow.com Cc: linuxppc-embedded@lists.linuxppc.org Subject: Re: SCC or SMC for console ? From: Wolfgang Denk Mime-version: 1.0 Content-type: text/plain; charset=ISO-8859-1 In-reply-to: Your message of "Thu, 14 Feb 2002 18:28:17 +0100." <3C6BF3B1.2040906@capflow.com> Date: Thu, 14 Feb 2002 19:31:58 +0100 Message-Id: <20020214183203.C4651109E2@denx.denx.de> Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: Dear Laurent, in message <3C6BF3B1.2040906@capflow.com> you wrote: > > I need 4 serial ports at runtime, and was wondering if I should rather > use 2SMC + 2SCC or 4 SCC (or 1SMC + 3SCC). Assuming that you need Ethernet: if you can use the FEC for Ethernet, that it does not matter much; otherwise I'd recommend to use 2SMC + 2SCC or 1SMC + 3SCC so that you have at east one SCC left for Ethernet. > I need a console, but no hardware flow control (which would force the > use of SCC). Should be no problem. The kernel on our FTP server was tested with 6 serial ports on a MPC860, with HW flow controll on all SCC's. The only problem in such a configuration is that you have only 4 BRG's so two ports have to share the baudrate with another port. Wolfgang Denk -- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx.de See us @ Embedded Systems Nuremberg, Feb 19-21, Hall 12 K01 (with TQ) ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/