Reset Pin

kt88seamp

When the propeller is in normal operation (no programmer attached) should the reset pin be pulled up or down or be left floating?

mctrivia

left floating

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
24 bit LCD Breakout Board now in. $21.99 has backlight driver and touch sensitive decoder.

Phil Pilgrim (PhiPi)

Left floating, only if /BOE is tied to Vss. Otherwise, you will need a pullup resistor.

-Phil

mpark

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

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 ???

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Style and grace : Nil point

Phil Pilgrim (PhiPi)

I believe it's more like 5K, which is plenty stiff to preclude requiring one externally.

-Phil

Toby Seckshund

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"

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Style and grace : Nil point

mpark

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

Toby Seckshund

The 1-5-07 cct shows it decked. So it must just be a "typo"

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Style and grace : Nil point

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

mpark

Where is this "1-5-07 cct"?

Toby Seckshund

parallax + protoboard then google. Same cct, just more ink.

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Style and grace : Nil point

mpark

Thanks.

OK, I think you're referring to this document: 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

Has this error been sent to Parallax Support already?

David

mpark

I would do it, but who'd I send it to?

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

@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)

David Carrier is the new point man for Prop support, BTW. But don't forget: Parallax is off until 4 Jan. 2010.

-Phil