roadrunner84 466 Posted January 30, 2013 Share Posted January 30, 2013 I wouldn't know why not. A small resistor calculation would give: 3v3/47k = 70uA even if the launchpad would have a resistor on this pin elready, the accumulated current would be about 140uA. There is no problem for the MSP to drive such a pin (I say this, because the programmer part of the launchpad is another MSP430). tripwire 1 Quote Link to post Share on other sites
tripwire 139 Posted January 30, 2013 Share Posted January 30, 2013 Thanks! I'll give it a go later on today, see what happens Quote Link to post Share on other sites
spirilis 1,264 Posted January 30, 2013 Share Posted January 30, 2013 Heh, never thought about pulling TEST to GND. Wonder if that's what kept screwing me up last month... (was doing a standalone WS2811 driving board and it was acting very bizarre, never figured it out) edit: Actually the datasheet (G2x53, G2x13 datasheet I'm looking at) mentions there is an internal pull-down on the TEST line. Rinternal - Internal pulldown resistance on TEST ... MIN 25, TYP 50, MAX 90 (units kOhms) Maybe that's just not sufficient? Quote Link to post Share on other sites
Lord anubis 1 Posted January 30, 2013 Share Posted January 30, 2013 Using a larger value does not really matter, unless you're programming the MSP with that capacitor connected. When programming, the capacitor should not exceed 2.2nF. ........ with too large a capacitor, the required clockrate cannot be reached. Hey, thank you for this tip. Quote Link to post Share on other sites
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