From: David Woodhouse <dwmw2@infradead.org>
To: zeusj@firstlinux.net
Cc: all in MTD mailinglist <linux-mtd@lists.infradead.org>
Subject: Re: misc question about MTD
Date: Fri, 10 May 2002 08:23:41 +0100 [thread overview]
Message-ID: <6578.1021015421@redhat.com> (raw)
In-Reply-To: <20020510064306.462BF2756@sitemail.everyone.net>
zeusj@firstlinux.net said:
> 1.in cfi_probe_chip(cfi_probe.c), what is an 'alias ' of a flash chip?
> is that the same flash chip mapping in different address?
Yes. Often, people will connect flash chips without all the address lines
being used, so they can swap in larger chips later. Then you get these
'aliases'.
> 2.if I send Query command (98h, I mean) twice, would the 'QRY' disappear?
Er, I don't know. I don't think so, but if this _is_ required then it could
be useful -- currently we have to use a chip-specific command to put chips
back in read mode when we do the alias detection.
> and if I send it once, can I read the 'QRY' for several times?
Yes, you can.
--
dwmw2
next prev parent reply other threads:[~2002-05-10 7:23 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-10 6:43 misc question about MTD Jim Zeus
2002-05-10 7:23 ` David Woodhouse [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-05-14 6:17 Jim Zeus
2002-05-14 7:40 ` David Woodhouse
2002-05-15 18:34 Jim Zeus
2002-05-15 18:49 ` David Woodhouse
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