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Re: [uClinux-dev] RS-485
- From: "Philip Nye" <philipn at engarts dot com>
- To: "uClinux development list" <uclinux-dev at uclinux dot org>,<ColdFire at wildrice dot com>, <rtems-users at rtems dot com>,<ecos-discuss at sources dot redhat dot com>
- Date: Fri, 12 Mar 2004 18:39:22 -0000
- Subject: [ECOS] Re: [uClinux-dev] RS-485
- Organization: Engineering Arts
- References: <20040312172937.34152.qmail@web14801.mail.yahoo.com>
Try Maxim, Linear-technology or Texas Instruments.
An RS485 "Unit load" allows 32 devices, but there are transceivers available which present half, quarter or in this case it seems eighth unit loads.
The "increased something" would be increased input impedance and reduced transmitter off-state (high-impedance) leakage.
Philip
----- Original Message -----
From: "Steven Retz" <sjr3tz@yahoo.com>
To: <ColdFire@wildrice.com>; <rtems-users@rtems.com>; <ecos-discuss@sources.redhat.com>; <uClinux-dev@uclinux.org>
Sent: Friday, March 12, 2004 5:29 PM
Subject: [uClinux-dev] RS-485
> I have come across some articles on the web that it states that one can have 256 devices on RS-485 bus by increased something within the transceivers. I am courous if anyone knows of a manufacutor that supplies RS-485 transceivers that support 256 devices on one medium.
>
> Steven Retz
>
>
>
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