From: Stocker, Michael (mstocker_at_accelent.com)
Date: Mon Feb 03 2003 - 11:50:57 PST
Sorry, for the confusion ....
What I meant by type, is another Newton product (other than MP2x00). =
Not two Newton off one connector.
Based on information below, 7.0V 0.5A AC adapters for MP130 should work =
on MP2x00 devices w/o problem?
Mike=20
-----Original Message-----
From: Victor Rehorst [mailto:victor_at_newtontalk.net]=20
Sent: Monday, February 03, 2003 2:31 PM
Subject: Re: [NTLK] Why did Apple use a serial dongle?
Quoting "Stocker, Michael" <mstocker_at_accelent.com>:
> Upon review of the Newton Interconnect Port ....
>=20
> Noticed that there is a provision for connecting more than one Newton =
=3D
> type device through the port:
> Pin 1 - PowerInPos2 (2-cell systems)
> Pin 2 - PowerInPos4 (4-cell systems)
> Pin14 - PowerInPos4 (4-cell systems)
Bzzt! Wrong. The PowerInPos were supposed to be capable of charging or
providing power to a Newton through the Interconnect port, the same way =
the AC
adapter plug does. If you were building a Newton docking station, you
wouldn't want to have to plug in a separate cable to charge it - heavens =
no!
Pin 1 was supposed to be used for Newtons that used 2-cell battery =
systems
(ie. a 3V power source as opposed to a 6V power source). There are no =
2-cell
Newtons. Where you got the idea that this was for connection two =
Newtons
together, I have no idea. This is all described on page 7 of the =
Interconnect
specs PDF I referenced earlier.
Oh hey, on a totally unrelated note... the limits of the Newton (2x00) =
power
system are actually buried on page 12 of this document... to quote =
again:
"The output of the adapter must be designed to appear as a Thevenin =
equivalent
source with an open circuit voltage of 6.75V to 7.50V, and have a source
resistance of 0.2W to 0.4W over an output current range of 5mA to =
1300mA.
When the current is below 5mA, the source voltage may not exceed 7.7V. =
The
output from the adapter must be current-limited to between 1.1A and =
1.3A, over
the input voltage range of 4.5V to 7.0V.
Below an output of 4.0V, the current limit may be folded back or stepped =
back
without damage."
Followed by two tables. In short, the absolute max VDC input is 7.50V =
and the
max current limit is 1300mA. The minimum useful VDC input is 5.6V.=20
Interested people, look up the info yourself instead of debating about =
my
lousy summary :)
--=20
Victor Rehorst - victor_at_newtontalk.net - chuma_at_chuma.org
NewtonTalk list administrator - http://www.newtontalk.net
Will the last person to leave the platform please turn off the =
backlight?
--=20
This is the NewtonTalk list - http://www.newtontalk.net/ for all =
inquiries
List FAQ/Etiquette/Terms: http://www.newtontalk.net/faq.html
Official Newton FAQ: http://www.chuma.org/newton/faq/
-- This is the NewtonTalk list - http://www.newtontalk.net/ for all inquiries List FAQ/Etiquette/Terms: http://www.newtontalk.net/faq.html Official Newton FAQ: http://www.chuma.org/newton/faq/
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