i.MX Processors中的主题 Re: imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281477#M32486 <HTML><HEAD></HEAD><BODY><P>So the first problem I see isn't with the power stuff, but with your DDR memory. You seem to be routing the pins "just to hook them up" -- this isn't a 100 kHz i2C bus on an Arduino board where you can get away with that -- this is a 266 MHz DDR memory bus. You can't use right-angle traces (they cause huge impedance changes), you have to keep trace spacing consistent (as much as possible), and the DDR CLK signals are a differential pair -- they need to be routed as such. Trace lengths need to be matched. Solid ground references need to be poured under the traces.</P><P></P><P>Two-layer boards are feasible, but only if you put the DDR memory on the bottom of the board, right under the i.MX233. <A href="https://github.com/OLIMEX/OLINUXINO/tree/master/HARDWARE/iMX233-OLinuXino-Micro">Download the design files from Olimex for their Olinuxino Micro</A> to see how they do it. I'm pretty sure they were inspired by the <A href="http://busware.de/tiki-index.php?page=TuxRail">TuxRail board</A>, which also has similar routing. Without putting the DDR memory under the chip, you're never going to get the trace lengths matched close enough for signal timing.</P><P></P><P>If you want to keep components on a single side, you'll have to go to a four-layer board. Trust me -- I've tried routing a two-layer single-sided i.MX233 board, and they've never worked. Four-layer boards make routing much better.</P><P></P><P>You also have major power issues. You just need to pay attention to what you're doing a little more, use planes better, and switch to smaller caps. First of all, use the largest traces you can fit for all power connections -- especially that inductor. You have a polygon pour on your top (red) layer, but look at it -- it's useless. None of the important components are connected to it because you've got traces and components that block it. I had to look at it for a while to figure out what it was even connected to -- ground. Typically, on two-layer boards, I do ground on the bottom and VDD on the top layer. I put my decoupling capacitors right next to the power supply pins, and then drop a via to ground.</P><P></P><P>You need to get those caps way closer to the pins -- and use wide traces if you need to carry power (say, the 1.2V supply rail that you're routing under the chip). For capacitor sizes, I recommend 0402 for the 100n, 0603 for the mid-sized (1-5.6uF), and 0805 for the big guys (33<SPAN style="font-size: 10pt; line-height: 1.5em;">+ uF). The DC/DC converter pins will need one of each of those. The i.MX reference design also has a 10n, but I've always safely ignored that one. Linear regular output pins just need the mid-sized one and the 100n -- I use 4.7u for the mid-size cap because I have a few reels of them laying around. Power input pins just need the 100n. In all cases, prioritize their placement in ascending order -- for the DC/DC converter outputs, the 100n should be closest, followed by the mid-sized cap, followed by the large reservoir cap.</SPAN></P><P></P><P>Your board is also just really sparsely placed and routed. There's huge gaps of hundreds of mils between components. You just need to squeeze everything in -- that'll help a lot.</P><P></P><P>For an example of a layout that works, here's a picture of one of my i.MX233 layouts:</P><P><IMG alt="xrgHacF.png" class="jive-image" src="http://i.imgur.com/xrgHacF.png" style="width: 620px; height: 678px;" /></P><P>Full disclosure, this board is obviously a work in progress and hasn't been tested, but it's in line with how a board like this should be routed. The layer stack-up I'm using is 3.3V on the top (orange) layer, 2.5V on the second (purple) layer, GND on the third layer (solid power plane -- no routing -- not shown), and 2.5V on the bottom (blue) layer. Do you see now nicely all the caps fit in together? Except for the 1.2V and 1.8V supplies (which only have a few connections), all the voltage nets are routed on planes and polygon pours. Here's a picture with those polygons shown:</P><P><IMG alt="G2dkjrw.png" class="jive-image" src="http://i.imgur.com/G2dkjrw.png" style="width: 620px; height: 721px;" /></P><P>Notice how few dead areas there are? That takes thoughtful, careful component placement and routing.</P><P></P><P>I don't want to get into a tools discussion -- because, at the end of the day, the best tool is the one that you know how to use. Having said that, I've never used KiCAD much, and although I'm a big fan of open-source software, until their experimental follow-me and push routing get integrated into the program, I don't think it's a useful tool to routing a board like this. It doesn't have any built-in support for length tuning, and routing is painfully slow to do. If you want to stick to KiCAD, you'll most likely have to export your board to FreeRouting.net, and do the routing there. Yuck.</P><P></P><P>Luckily, as a university student, I have access to Altium -- so I was able to route this whole board by hand in about an hour :-) If you have access to a professional PCB editor, you should definitely take time to learn it. And if you ever get a job doing PCB design for a company, don't let your boss be a cheapskate -- make him or her get you a copy of a real PCB editor (Altium, Orcad, PADS, etc).</P></BODY></HTML> Sat, 29 Mar 2014 22:12:04 GMT jaydcarlson 2014-03-29T22:12:04Z imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281452#M32461 <HTML><HEAD></HEAD><BODY><P>I'm working on my own imx233 board and I get unexpexted boot problem. Using bootlets the board keeps rebooting just after voltage measurement.</P><P></P><P>I double checked every power pin, and the inductor.(Since I did not intend to use battery I did not put any capacitor connected to DCDC_Batt and Batt, could this be a problem?)</P><P></P><P>I tried with u-boot, and it also crash after "HTLC", but does not reboot after. The voltage are then stable 5V, 4.2V, 2.5V are ok, but 3.3 VDDA VDDD are down to zero.</P><P></P><P>Would you have a hint on where to look for ?</P><P></P><P>Thanks in advance.</P><P></P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 0.88V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.91V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage meas�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 1.90V</P></BODY></HTML> Thu, 06 Mar 2014 22:32:12 GMT https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281452#M32461 pierreparent 2014-03-06T22:32:12Z Re: imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281453#M32462 <HTML><HEAD></HEAD><BODY><P>Here are the capatictors used:</P><P></P><P>VDDA:</P><P>&nbsp; 33uF</P><P>&nbsp; 100nF</P><P>&nbsp; 10nF</P><P></P><P>VDDD:</P><P>&nbsp; 33uF</P><P>&nbsp; 100nF</P><P>&nbsp; 10nF</P><P></P><P>VDDIO:</P><P>&nbsp; 33uF</P><P>&nbsp; 1uF</P><P>&nbsp; 100nF</P><P>&nbsp; 10nF&nbsp; </P><P>&nbsp; </P><P>5V (regulated input):</P><P>&nbsp; 33uF</P><P>&nbsp; 100nf</P><P></P><P>2.5V:</P><P>&nbsp; 100nf x5</P><P>&nbsp; 1uf</P><P></P><P>BATT (linked with DCDC_BATT):</P><P>&nbsp; none</P></BODY></HTML> Thu, 06 Mar 2014 23:11:00 GMT https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281453#M32462 pierreparent 2014-03-06T23:11:00Z Re: imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281454#M32463 <HTML><HEAD></HEAD><BODY><P>You can try using mainline U-Boot (2014.01) on this board. See if that reboots as well or not ...</P></BODY></HTML> Fri, 07 Mar 2014 00:45:33 GMT https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281454#M32463 MarekVasut 2014-03-07T00:45:33Z Re: imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281455#M32464 <HTML><HEAD></HEAD><BODY><P>Thanks for your reply,</P><P></P><P>As I said before "I tried with u-boot, and it also crash after "HTLC", but does not reboot after. The voltage are then stable 5V, 4.2V, 2.5V are ok, but 3.3 VDDA VDDD are down to zero."</P><P></P><P>Though I'm unsure what version of u-boot I used,. I will check.</P><P></P><P>The result is the same booting on sd or with Usb (mxsldr)</P></BODY></HTML> Fri, 07 Mar 2014 08:34:49 GMT https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281455#M32464 pierreparent 2014-03-07T08:34:49Z Re: imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281456#M32465 <HTML><HEAD></HEAD><BODY><P>It seems the same problems appear on some olinuxino boards:</P><P></P><P><A href="https://www.olimex.com/forum/index.php?topic=39.0" title="https://www.olimex.com/forum/index.php?topic=39.0">beginner boot issue- repeated "PowerPrep start initialize power..."</A></P><P><A href="https://www.olimex.com/forum/index.php?topic=779.0" title="https://www.olimex.com/forum/index.php?topic=779.0">Hardware issues on new olinuxino boards</A></P><P><A href="https://www.olimex.com/forum/index.php?topic=347.0" title="https://www.olimex.com/forum/index.php?topic=347.0">Olinuxino micro doesn´t boot</A></P><P></P><P>Was this problem solved, or do we know preciselly where it comes form?</P></BODY></HTML> Fri, 07 Mar 2014 08:56:01 GMT https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281456#M32465 pierreparent 2014-03-07T08:56:01Z Re: imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281457#M32466 <HTML><HEAD></HEAD><BODY><P>I recall we had such issue some time ago, but we are no longer getting the reports with the new version of U-Boot. Might be worth trying, so please let me know ... But if your VDDD and VDDA are not outputting anything , it might be something strange with the DC converter in the CPU . Did you change any wiring/components of it on your new hardware from either the reference design or olinuxino ?</P></BODY></HTML> Fri, 07 Mar 2014 10:11:18 GMT https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281457#M32466 MarekVasut 2014-03-07T10:11:18Z Re: imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281458#M32467 <HTML><HEAD></HEAD><BODY><P>Well yes i did some minor changes on components as I said before. For exemple no capacitor on battery, no reset button.</P><P></P><P>At first I get correct VDDA and VDDD the prolem seems to occur while switching from linreg to 4P2 DCDC.</P><P></P><P>I will inform you for uboot. And I will solder an other board (since I have 2 pcbs) to be sure there is no "soldering bug".</P></BODY></HTML> Fri, 07 Mar 2014 10:34:14 GMT https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281458#M32467 pierreparent 2014-03-07T10:34:14Z Re: imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281459#M32468 <HTML><HEAD></HEAD><BODY><P>So I tested with u-boot 4.1 it does "HTLC" and crashes into a weird state where VDDIO VDDA and VDDD are down, but 4.2 &amp; 2.5 are up. In this state any instability will make the board reboot.</P><P></P><P>If I boot with no sd card in slot, I get 3.3v 1.8v and 1.2v but 2.5 and 4.2v are down (wich is normal).</P><P></P><P>I wonder if it can be a capacitor problem, or whether the imx must have been damaged.</P></BODY></HTML> Fri, 07 Mar 2014 17:22:45 GMT https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281459#M32468 pierreparent 2014-03-07T17:22:45Z Re: imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281460#M32469 <HTML><HEAD></HEAD><BODY><P>I soldered the other pcb. It does not boot either but gets a little further:</P><P>(It does not reboot I reboot manually)</P><P></P><P>HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 0.73V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage measurements./r/nLLCMar&nbsp; 6 201422:28:49</P><P>EMI_CTRL 0x1C084040</P><P>FRAC 0x92926192</P><P>init_ddr_mt46v32m16_133Mhz</P><P>power 0x00820710</P><P>Frac 0x92926192</P><P>start change cpu freq</P><P>hbus 0x00000003</P><P>cpu 0x00010001</P><P>L </P><P>DatHTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 0.88V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage measurements./r/nLLCMar&nbsp; 6 201422:28:49</P><P>EMI_CTRL 0x1C084040</P><P>FRAC 0x92926192</P><P>init_ddr_mt46v32m16_133Mhz</P><P>power 0x00820710</P><P>Frac 0x92926192</P><P>start change cpu freq</P><P>hbus 0x00000003</P><P>cpu 0x00010001</P><P>L</P><P>Data Aort</P><P>r14abt: </P><P>HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P><P>PowerPrep start initialize power...</P><P>Battery Voltage = 0.88V</P><P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage measurements./r/nLLCMar&nbsp; 6 201422:28:49</P><P>EMI_CTRL 0x1C084040</P><P>FRAC 0x92926192</P><P>init_ddr_mt46v32m16_133Mhz</P><P>power 0x00820710</P><P>Frac 0x92926192</P><P>start change cpu freq</P><P>hbus 0x00000003</P><P>cpu 0x00010001</P><P>L</P><P></P><P>Maybe If I solder a third it will be ok! ^^</P></BODY></HTML> Sun, 09 Mar 2014 19:08:14 GMT https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281460#M32469 pierreparent 2014-03-09T19:08:14Z Re: imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281461#M32470 <HTML><HEAD></HEAD><BODY><P>Pierre,</P><P></P><P>Few years ago I had the same problems that you have now with an iMX233 board. Definitively the problem was due to poor PDN (power delivery network). Can you explain a little more how is your board?: number of layers, build-up, processor package (qfn or bga), DDR package (tssop or BGA), decoupling caps per pin/ball, bulk caps, and so on...</P><P></P><P>Best regards,</P><P>Manuel.</P></BODY></HTML> Sun, 09 Mar 2014 20:01:11 GMT https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281461#M32470 EgleTeam 2014-03-09T20:01:11Z Re: imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281462#M32471 <HTML><HEAD></HEAD><BODY><P>Thanks for your answer!</P><P></P><P>It's a 2 layers pcb (1 layer for components).</P><P>lqfp128 for imx</P><P>ssop66 for ram</P><P></P><P>Well actually when I designed the board, I was not aware of freescale design reference.</P><P></P><P>I was a bit light on capacitors, so I guess it must be the cause of my problem. I made a litlle diff list with reference design. Here is what's lacking.</P><P></P><P>VDDA:&nbsp; 1uF x2; 100nf</P><P>VDDD: 1uF; 100nF x2</P><P>VDDIO: 100nF x2; 1UF (SD)</P><P>5V (regulated input): ok</P><P>VDD4P2: ok (exept for resistor 0.1ohm in serial with 33uF)</P><P>2.5V (RAM):&nbsp; 1uF;&nbsp; 100nf x5</P><P>BATT (linked with DCDC_BATT):&nbsp; Is this really necessary if not using battery?</P><P>VDDXTAL: ok</P><P></P><P>I will try to add some of them by hand without producing a new pcb. I will inform you if it improves something.</P><P></P><P>Best regards,</P><P>Pierre.</P></BODY></HTML> Sun, 09 Mar 2014 20:26:35 GMT https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281462#M32471 pierreparent 2014-03-09T20:26:35Z Re: imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281463#M32472 <HTML><HEAD></HEAD><BODY><P>Your welcome Pierre,</P><P></P><P>that's how I begun and it was no possible. My suggestion: use at least 4 layers and if possible 6 (since there's no BGA you can order PCBs in class 5 and the difference between 4 and 6 layers is not too expensive). </P><P></P><P>On the other hand, if you solder your prototypes by hand... avoid to solder with tip: with solder paste + hot air you get&nbsp; better solder joint.</P><P></P><P>I hope you get your board working as soon as possible! :-)</P><P></P><P>Best regards,</P><P>Manuel.</P></BODY></HTML> Sun, 09 Mar 2014 20:51:31 GMT https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281463#M32472 EgleTeam 2014-03-09T20:51:31Z Re: imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281464#M32473 <HTML><HEAD></HEAD><BODY><P>EDIT: I just read your second message that indicates you connected BATT and DCDC_BATTERY together. That's your problem. Lift the chip, cut your trace, re-solder, and your board should work. Good luck! /EDIT</P><P></P><P>Since you're not using a battery, did you leave the BATT and DCDC_BATTERY pins disconnected? If they're connected together, your board will not boot. I recently ran a board that uses the IMX233 (in the LQFP package), and doesn't have battery support. You may want to cross-check your schematic with mine to make sure you've got everything in order. Here's the schematic of the power block of my design:</P><P><IMG alt="dg2Gb91.png" class="jive-image" src="http://i.imgur.com/dg2Gb91.png" style="width: 620px; height: 483px;" /></P></BODY></HTML> Mon, 10 Mar 2014 18:04:47 GMT https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281464#M32473 jaydcarlson 2014-03-10T18:04:47Z Re: imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281465#M32474 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>Thanks for the tip. Indeed I connected BATT with DCDC_BATT. Unfortunatly the trace is under the imx.</P><P></P><P>I'm not sure to follow you. On olinuxino boards those two pins are connected, and yet it boots fine without any battery. Do you mean that if we connect the those two pins then the capacitors on BATT are compulsory?</P></BODY></HTML> Mon, 10 Mar 2014 18:12:30 GMT https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281465#M32474 pierreparent 2014-03-10T18:12:30Z Re: imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281466#M32475 <HTML><HEAD></HEAD><BODY><P>Yes, because DCDC_BATTERY will have transient voltage spikes on it (regardless of if there's a battery hooked up or not) -- it's a DC/DC converter output, after all. Connecting that to the BATT pin will feed those transients back into the chip, which will screw up the battery detection / power subsystem.</P><P></P><P>If you remove the DCDC_BATTERY capacitors from an Olinuxino board, you'll notice it, too, will stop working -- regardless of if there's a battery attached or not. Trust me, I tried it :-)</P><P></P><P>The only solution is to lift the chip (with a hot air gun), cut the trace, and resolder.</P></BODY></HTML> Mon, 10 Mar 2014 18:20:25 GMT https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281466#M32475 jaydcarlson 2014-03-10T18:20:25Z Re: imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281467#M32476 <HTML><HEAD></HEAD><BODY><P>Ok thanks a lot! I'll give it a try. (Anyway for now adding capacitors on VDDA VDDD VDDM seems to improve nothing, but i'll include them in my firther designs)</P><P>I'll inform you about the result, but it may not be before a few days because of few technical diffcultes for cutting the trace and a busy scedule.</P></BODY></HTML> Mon, 10 Mar 2014 18:46:50 GMT https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281467#M32476 pierreparent 2014-03-10T18:46:50Z Re: imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281468#M32477 <HTML><HEAD></HEAD><BODY><P>Hi, so I soldered a new board with the two&nbsp; pins disconected (It was easier and safer).</P><P></P><P>Unfortunatly I get pretty much the same result. Exept that this time it reboots on its own, and not always at the same point.</P><P></P><P>I added every laking capacitor on VDDA and VDDD. The strange thing is for VDDD I get 1.5V instead of 1.2V.</P><P></P><P>I'll keep investigate.</P><P></P><BLOCKQUOTE> <P>LLLFC</P> <P>PowerPrep start initialize power...</P> <P>Battery Voltage = 1.54V</P> <P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage measurements./r/nLLCMar&nbsp; 6 201422:28:49</P> <P>EMI_CTRL 0x1C084040</P> <P>FRAC�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P> <P>PowerPrep start initialize power...</P> <P>Battery Voltage = 3.08V</P> <P>Chargeable battery detected but&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the voltage is too low for battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; powered operation.Booting from 5V&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; power source.</P> <P>LLCMar&nbsp; 6 201422:28:49</P> <P>EMI_CTRL 0x1C084040</P> <P>FRAC 0x92926192</P> <P>init_ddr_mt46v32m16_133Mhz</P> <P>power 0x00820710</P> <P>Frac 0x92926192</P> <P>start change cpu freq</P> <P>hbus 0x00000003</P> <P>cpu 0x00010001</P> <P>L</P> <P>Data Abort</P> <P>r14_HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P> <P>PowerPrep start initialize power...</P> <P>Battery Voltage = 1.49V</P> <P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage measurements./r/nLLCMar&nbsp; 6 201422:28:49</P> <P>EMI_CTRL 0x1C084040</P> <P>FRAC 0x92926192</P> <P>HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P> <P>PowerPrep start initialize power...</P> <P>Battery Voltage = 3.06V</P> <P>Chargeable battery detected but&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the voltage is too low for battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; powered operation.Booting from 5V&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; power source.</P> <P>LLCMar&nbsp; 6 201422:28:49</P> <P>EMI_CTRL 0x1C084040</P> <P>FRAC 0x92926192</P> <P>init_ddr_mt46v32m16_133Mhz</P> <P>power 0x00820710</P> <P>Frac 0x92926192</P> <P>start change cpu freq</P> <P>hbus 0x00000003</P> <P>cpu 0x00010001</P> <P>L</P> <P>Data Abort</P> <P>r14_HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P> <P>PowerPrep start initialize power...</P> <P>Battery Voltage = 1.50V</P> <P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage measurements./r/nLLCMar&nbsp; 6 201422:28:49</P> <P>EMI_CTRL 0x1C084040</P> <P>FRAC 0x92926192</P> <P>init_ddr_mt46v32m16_133Mhz</P> <P>power 0x00820710</P> <P>Frac 0x92926192</P> <P>start ch�HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P> <P>PowerPrep start initialize power...</P> <P>Battery Voltage = 1.51V</P> <P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage measurements./r/nLLCMar&nbsp; 6 201422:28:49</P> <P>EMI_CTRL 0x1C084040</P> <P>FRAC 0x92926192</P> <P>HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P> <P>PowerPrep start initialize power...</P> <P>Battery Voltage = 3.08V</P> <P>Chargeable battery detected but&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the voltage is too low for battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; powered operation.Booting from 5V&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; power source.</P> <P>LLCMar&nbsp; 6 201422:28:49</P> <P>EMI_CTRL 0x1C084040</P> <P>FRAC 0x92926192</P> <P>init_ddr_mt46v32m16_133Mhz</P> <P>power 0x00820710</P> <P>Frac 0x92926192</P> <P>start change cpu freq</P> <P>hbus 0x00000003</P> <P>cpu 0x00010001</P> <P>L0x80206004</P> <P>0x80502008</P> <P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P> <P>PowerPrep start initialize power...</P> <P>Battery Voltage = 1.57V</P> <P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage measurements./r/nLLCMar&nbsp; 6 201422:28:49</P> <P>EMI_CTRL 0x1C084040</P> <P>FRAC 0x92926192</P> <P>init_ddr_mt46v32m16_133Mhz</P> <P>power 0x00820710</P> <P>Frac 0x92926192</P> <P>start change cpu freq</P> <P>HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P> <P>PowerPrep start initialize power...</P> <P>Battery Voltage = 3.07V</P> <P>Chargeable battery detected but&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the voltage is too low for battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; powered operation.Booting from 5V&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; power source.</P> <P>LLCMar&nbsp; 6 201422:28:49</P> <P>EMI_CTRL 0x1C084040</P> <P>FRAC 0x92926192</P> <P>init_ddr_mt46v32m16_133Mhz</P> <P>power 0x00820710</P> <P>Frac 0x92926192</P> <P>start change cpu freq</P> <P>hbus 0x00000003</P> <P>cpu 0x00010001</P> <P>L</P> <P>Data Abort</P> <P>r14_HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P> <P>PowerPrep start initialize power...</P> <P>Battery Voltage = 1.55V</P> <P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage measurements./r/nLLCMar&nbsp; 6 201422:28:49</P> <P>EMI_CTRL 0x1C084040</P> <P>FRAC 0x92926192</P> <P>init_ddr_mt46v32m16_133Mhz</P> <P>power 0x00820710</P> <P>Frac 0x92926192</P> <P>start change cpu freq</P> <P>HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P> <P>PowerPrep start initialize power...</P> <P>Battery Voltage = 3.12V</P> <P>Chargeable battery detected but&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the voltage is too low for battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; powered operation.Booting from 5V&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; power source.</P> <P>LLCMar&nbsp; 6 201422:28:49</P> <P>EMI_CTRL 0x1C084040</P> <P>FRAC 0x92926192</P> <P>init_ddr_mt46v32m16_133Mhz</P> <P>power 0x00820710</P> <P>Frac 0x92926192</P> <P>start change cpu freq</P> <P>hbus 0x00000003</P> <P>cpu 0x00010001</P> <P>L</P> <P>Data Abort</P> <P>r14_HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P> <P>PowerPrep start initialize power...</P> <P>Battery Voltage = 1.54V</P> <P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage measurements./r/nLLCMar&nbsp; 6 201422:28:49</P> <P>EMI_CTRL 0x1C084040</P> <P>FRAC 0x92926192</P> <P>HTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P> <P>PowerPrep start initialize power...</P> <P>Battery Voltage = 3.13V</P> <P>Chargeable battery detected but&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; the voltage is too low for battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; powered operation.Booting from 5V&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; power source.</P> <P>LLCMar&nbsp; 6 201422:28:49</P> <P>EMI_CTRL 0x1C084040</P> <P>FRAC 0x92926192</P> <P>init_ddr_mt46v32m16_133Mhz</P> <P>power 0x00820710</P> <P>Frac 0x92926192</P> <P>start change cpu freq</P> <P>hbus 0x00000003</P> <P>cpu 0x00010001</P> <P>L</P> <P>Undefined Instruction</P> <P>r14_unHTLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLFC</P> <P>PowerPrep start initialize power...</P> <P>Battery Voltage = 1.54V</P> <P>No battery or bad battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; detected!!!.Disabling battery&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; voltage measurements./r/nLLCMar&nbsp; 6 201422:28:49</P> <P>EMI_CTRL 0x1C084040</P> <P>FRAC 0x92926192</P> <P>init_ddr_mt46v32m16_133Mhz</P> <P>power 0x00820710</P> <P>Frac 0x92926192</P> <P>start change cpu freq</P> <P></P> <P>.</P> </BLOCKQUOTE></BODY></HTML> Sun, 16 Mar 2014 11:13:08 GMT https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281468#M32477 pierreparent 2014-03-16T11:13:08Z Re: imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281469#M32478 <HTML><HEAD></HEAD><BODY><P>Looking at the log it's intersting to see that each time it goes "Chargeable battery detected but ..." then it goes as far as "L"</P><P>But if it goes "No battery or bad battery" then it always crash before.</P><P></P><P><SPAN style="text-decoration: line-through;">Also I see a diference with your design: I have a 1uF capa on VAG. Is it important? [edit: I guess not since it's a hp thing]</SPAN></P><P><SPAN style="text-decoration: line-through;"><BR /></SPAN></P><P>Can the location of the capacitors on the board have a real impact? <SPAN style="text-decoration: line-through;"><BR /></SPAN></P></BODY></HTML> Sun, 16 Mar 2014 11:19:07 GMT https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281469#M32478 pierreparent 2014-03-16T11:19:07Z Re: imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281470#M32479 <HTML><HEAD></HEAD><BODY><P>@Jay Carlson</P><P></P><P>Could you please confirm that you have a board running with this design (no capacitor on battery and two pins separated). What software are your running? What output do you get?</P><P></P><P>Thanks in advance!</P><P>Pierre.</P></BODY></HTML> Tue, 25 Mar 2014 20:59:35 GMT https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281470#M32479 pierreparent 2014-03-25T20:59:35Z Re: imx233 keeps rebooting while initializing power. https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281471#M32480 <HTML><HEAD></HEAD><BODY><P>I'm running Yocto and it works fine with the pins disconnected and no capacitor. I get the correct DC output voltages. The location of the caps on the board can definitely have an impact. Do you have a picture of your board layout? What's your stackup?</P><P></P><P>Your bootup screen looks a lot different from mine -- I assume you're not using u-boot-fslc in the Yocto distribution? That's the only thing I'm familiar with. Perhaps it's your boot code?</P></BODY></HTML> Tue, 25 Mar 2014 21:23:55 GMT https://community.nxp.com/t5/i-MX-Processors/imx233-keeps-rebooting-while-initializing-power/m-p/281471#M32480 jaydcarlson 2014-03-25T21:23:55Z