Hi Graham, Thank you for the reply.
Yes, I figured this out about the TPS65217C, but couldn't find a way to edit my post to remove that part of the question. My initial searches didn't turn up anything regarding the 1st question so I thought it might be faster to get some pointers from others since I'm working on a tight deadline. On Friday, February 1, 2019 at 5:43:15 AM UTC-8, [email protected] wrote: > > I think the answers to 1, 2, and 3 have all been asked and answered before > on this email reflector. > A little bit of searching for appropriate keywords will get you the > answers to those. > > > For number 4, you are confusing survival (non-operating) with operating > conditions. > Read the footnotes to the "Absolute Maximum Ratings" chart. they are > important. > > If you go outside of the "Recommended Operating Conditions" chart supply > voltages of 4.3 to 5.8 Volts, the TPS65217C goes into an emergency shutdown > to protect itself and the CPU. > So if you want to run from 10 to 15 Volts power, you will need an external > buck-converter or other step down power supply ahead of the TPS65217 to > feed it 5 Volts. > > --- Graham > > == > > On Thursday, January 31, 2019 at 12:32:55 PM UTC-6, > [email protected] wrote: >> >> >> Hello Everyone, >> >> I tried to post this yesterday and got a brief "Your discussion has been >> posted" message, but then later could not find the post, so sorry if it >> gets double posted. >> >> I'm looking into creating a custom board for a client based on the >> BeagleBoard Black and had a few questions. I will be creating the hardware >> design and the client will handle all the software requirements. Almost the >> whole BBB will get replicated, with the exception of the HDMI and perhaps >> the Ethernet (both of which are not used in their application). Some of >> these questions are geared towards software, but I want to make sure that >> all the bases are covered and I can point the clients down the correct path >> in bringing up the new board. Any feedback from those who have endeavored >> on this path before is greatly appreciated. >> >> >> 1. I understand the BeagleBoards come pre-programmed with a Linux >> kernel and U-Boot, however, new chips we purchase from the factory will >> be >> black. What is the method for first programming of the blank chips? Can >> it >> be done via the USB Client port or MicroSD? >> >> 2. I understand there's an EEPROM on board that contains board >> identification information, which is used by the Kernel and U-Boot to >> setup >> and boot the board correctly. What areas need to be modified to bring up >> a >> board that does not contain the EEPROM, or contains a blank EEPROM? >> >> 3. The SRM mentioned that some of the TPS65217C power rails had been >> modified to 1.5V instead of 1.8V. Where is this set? I'm guessing this is >> done in software and somewhat related to question 2. >> >> 4. The device needs to be powered by an unregulated 12v supply and be >> able to withstand 10v - 14.5v. The TPS65217C datasheet indicates it can >> support a supply voltage range of -0.3V to 20V, however, the recommended >> operating supply voltage is 4.3V - 5.8V. Has anyone used the chip outside >> of the recommended supply voltage, and were there any issues? >> >> >> Thank you in advance for any feedback. >> > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/63f45ce1-cb8b-403d-8b72-2e1ccd269a07%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
