From: Ralf Baechle <ralf@linux-mips.org>
To: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
Cc: Jun Sun <jsun@mvista.com>, linux-mips@linux-mips.org
Subject: Re: [patch] Generic time fixes
Date: Wed, 23 Jul 2003 00:37:45 +0200 [thread overview]
Message-ID: <20030722223745.GC1660@linux-mips.org> (raw)
In-Reply-To: <Pine.GSO.3.96.1030722225739.607J-100000@delta.ds2.pg.gda.pl>
To add some performance numbers to the debate. The DS1286 which is one of
the oldest chips we're supporting has a minimum write cycle time of 150ns.
The M48T02 which is used in the Origin needs 70ns, 150ns or 200ns depending
on the version. Ok, those are slow numbers but they're not as bad as
postcards ... I2C and it's evil brothers a is in a different universe
though. There are busses in that cathegory that can transfer like 1kbyte/s.
Ralf
next prev parent reply other threads:[~2003-07-22 22:37 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-22 7:58 [patch] Generic time fixes Maciej W. Rozycki
2003-07-22 8:32 ` Jan-Benedict Glaw
2003-07-22 10:04 ` Ralf Baechle
2003-07-22 10:21 ` Wolfgang Denk
2003-07-22 11:21 ` Ralf Baechle
2003-07-22 20:54 ` Maciej W. Rozycki
2003-07-22 17:16 ` Jun Sun
2003-07-22 21:24 ` Maciej W. Rozycki
2003-07-22 20:38 ` Maciej W. Rozycki
2003-07-22 17:10 ` Jun Sun
2003-07-22 21:21 ` Maciej W. Rozycki
2003-07-22 22:37 ` Ralf Baechle [this message]
2003-07-22 22:55 ` Maciej W. Rozycki
2003-07-22 22:43 ` Jun Sun
2003-07-22 23:10 ` Maciej W. Rozycki
2003-07-22 23:37 ` Jun Sun
2003-07-23 0:30 ` Maciej W. Rozycki
2003-07-23 1:14 ` Jun Sun
2003-07-23 14:52 ` Maciej W. Rozycki
2003-07-23 17:00 ` Jun Sun
2003-07-24 11:13 ` Maciej W. Rozycki
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