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kt88seamp
12-13-2009, 04:30 AM
When the propeller is in normal operation (no programmer attached) should the reset pin be pulled up or down or be left floating?

mctrivia
12-13-2009, 04:46 AM
left floating

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24 bit LCD Breakout Board now in. $21.99 has backlight driver and touch sensitive decoder. (http://forums.parallax.com/showthread.php?p=848975)

Phil Pilgrim (PhiPi)
12-13-2009, 05:47 AM
Left floating, only if /BOE is tied to Vss. Otherwise, you will need a pullup resistor.

-Phil

mpark
12-13-2009, 05:45 PM
I'm having trouble understanding this floating reset business. Regardless of /BOE, it seems like a floating reset is just asking for trouble. Can someone please explain the rationale?

Toby Seckshund
12-13-2009, 06:33 PM
The reset line gains a pull up when /BOE os held low but is the actual value of the pull up quoted anywhere ?

ie - is it 10K ish, etc ???

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Phil Pilgrim (PhiPi)
12-13-2009, 06:47 PM
I believe it's more like 5K, which is plenty stiff to preclude requiring one externally.

-Phil

Toby Seckshund
12-13-2009, 06:52 PM
That is a good value for the pull up. I was worrying that the value would have been weak, 100K ish, and end up being "almost floating"

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Style and grace : Nil point

mpark
12-24-2009, 10:58 PM
How come BOEn appears to be floating in the protoboard schematic?

www.parallax.com/Portals/0/Downloads/docs/prod/prop/32212-32812-PropellerProtoBoard-v1.3.pdf (http://www.parallax.com/Portals/0/Downloads/docs/prod/prop/32212-32812-PropellerProtoBoard-v1.3.pdf)

Toby Seckshund
12-24-2009, 11:05 PM
The 1-5-07 cct shows it decked. So it must just be a "typo"

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Post Edited (Toby Seckshund) : 12/24/2009 3:10:36 PM GMT

mpark
12-25-2009, 02:13 AM
Where is this "1-5-07 cct"?

Toby Seckshund
12-25-2009, 03:33 AM
parallax + protoboard then google. Same cct, just more ink.

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Style and grace : Nil point

mpark
12-25-2009, 03:57 AM
Thanks.

OK, I think you're referring to this document: www.parallax.com/dl/docs/prod/prop/Propeller-ProtoBoard-v1.1.pdf (http://www.parallax.com/dl/docs/prod/prop/Propeller-ProtoBoard-v1.1.pdf)

That one does show BOEn tied to ground. But it's an old version (1.1). The "typo" is in 1.3. Hopefully it'll be corrected in 1.4.

Drone
12-26-2009, 01:07 AM
Has this error been sent to Parallax Support already?

David

mpark
12-26-2009, 02:09 AM
I would do it, but who'd I send it to?

www.parallax.com/Company/ContactUs/tabid/66/Default.aspx (http://www.parallax.com/Company/ContactUs/tabid/66/Default.aspx) says support(at)parallax.com is for BASIC Stamp and SX support and doesn't say anything about Propeller support.

Drone
12-26-2009, 09:12 PM
@mpark, I've sent propeller questions to the support email address you mention in the rare cases when I have not been able to find an answer in the propeller forum. They usually respond, but not always. You could also try giving them a call.

Rgds, David

Phil Pilgrim (PhiPi)
12-27-2009, 03:03 AM
David Carrier is the new point man for Prop support, BTW. But don't forget: Parallax is off until 4 Jan. 2010.

-Phil