Post by thread:[SX] "Chip connection Failed"

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Mag748 wrote:

I receive this error now whenever I try to download anything to my SX28. What does this mean? Also, how do I connect a resonator to the SX without the SX Tech board? Thanks, Marcus ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=125625 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2006 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Peter Van der Zee wrote:Hi Mag748; The most common reason for that type of message is a bad connector on your SX-Key. It happens to me frequently, and I just jiggle the thing side to side, then usually all is well again. On occasion the IDE program locks up, then I need to close and re-open it, and all is well.

Cheers, Peter (pjv) ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=125625#m125626 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2006 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Mag748 wrote:I have 2 SX28 chips and it only happens with one of them. I think its a problem with the chip. I was wondering if any techies knew what was wrong with the chip itself. Maybe a bad eeprom? dont know. Thanks pjv.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:If it's a bad chip, it's a bad chip. It really doesn't make sense to troubleshoot a $4 chip. Just chuck it. Bean.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Mag748 wrote:Ok. Now where can I find an answer to the second question?

Thanks, Marcus ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=125625#m125647 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2006 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Forrest wrote:>>Also, how do I connect a resonator to the SX without the SX Tech board?<< Solder works well :-) If you want a better answer, then you'll need to refine your question.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Mag748 wrote:Sorry. Here is a better explanation. I have a 3 pin 20 MHz resonator (it's a little tan blobby thing with three pins coming out of the bottom). I put it in the socket on the SX Tech board and it works fine. Now I want to transfer this to a perf board. Right now I have the leftmost pin connected to pin 26 on the SX and the right most pin connected to pin 27 on the SX. And the middle pin of the resonator is connected to ground. Is this correct? And also, does the MCLR pin have to be connected to anything with this set up? Thank you, Marcus.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, bean wrote:Sounds like you have the resonator connected correctly. You MAY (or may not) need a resistor across the outermost pins of the resonator. It usually works without a resistor, but it is recommended. The MCLR pin must be connected to Vcc with a 10K resistor. You should also use one of the brown-out-reset settings on the device line of your program. BOR42 if you are using 5volts. Bean.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Mag748 wrote:

One more thing, I noticed large capacitors on the BOE next to the power input. Are these for filtering purposes? and should I have any on my perf board? Thank you, Marcus ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=125625#m125811 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2006 (http://www.dotNetBB.com)

In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Forrest wrote:Those capacitors are required if you're using a voltage regulator such as the 7805 or 2940-5. Check the voltage regulator data sheet for recommended capacitor types and values.

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In SX Microcontrollers, SX/B Compiler and SX-Key Tool, holdsthechains wrote:I had this problem recently. Don't throw anything out without trying a fresh battery if you're using a battery powered device. I almost ruined my SX-key trying to figure out what was wrong. Also, turn down (off) the fifo buffers on the comport uart.

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