On Friday 13 November 2015 13:55:11 John Prentice (FS) wrote: > Greetings > > > -----Original Message----- > > From: andy pugh [mailto:[email protected]] > > Sent: 12 November 2015 22:07 > > To: Enhanced Machine Controller (EMC) > > Subject: Re: [Emc-users] 5i25 miss-behaving > > > > On 12 November 2015 at 21:44, Gene Heskett <[email protected]> wrote: > >>> Checking the status in showconfig, it (gpio.003) is an input. And > >>> I do not believe I have a separate pullup on the line, that card > >>> is AFAIK, doing that 3.3 volts. Any pullups I would have > >>> installed would have been to the 5 volt rail. > > > > Are the 5i25 inputs 5V tolerant? > > -- > > > atp > > It all depends! From 5i25 manual > > 5V I/O TOLERANCE > The FPGA used on the 5I25 has a 4V absolute maximum input voltage > specification. To allow interfacing with 5V inputs, the 5I25 has bus > switches on all I/O pins. > The bus switches work by turning off when the input voltage exceeds a > preset threshold. > The 5V I/O tolerance option is the default and should normally be left > enabled. > For high speed applications where only 3.3V maximum signals are > present and overshoot clamping is desired, the 5V I/O tolerance option > can be disabled. W3 controls > the 5V I/O tolerance option. When W3 is on the default UP position, 5V > tolerance mode > is enabled. When W3 is in the DOWN position, 5V tolerance mode is > disabled. Note that > W3 controls 5V tolerance on both P2 and P3 I/O connectors. > W3 also selects the pull-up resistor voltage, When 5V I/O tolerance > mode is selected, the I/O pull-up resistors are powered from 5V. When > 5V I/O tolerance mode is > disabled, the I/O pull-up resistors are powered with 3.3V. > > John Prentice > And ATM, I have no clue of the state of W3, whatever Peter shipped it in I assume. I'll look between boards later. Damned wood has only shrunk 1/16" since I bought it. But now I have 2 miss-0carved end boards I will have to do the matching side boards for before I can correct my software.
This Hartland Lumber & Planing mill stuff is half the quality & seasoning of what I got from Home Depot for the first chest. But while it was s4s 1x6, this was s4s 1x12, but pieced together to make the 12, with only one side really smooth. Never again, I'll take my chances and order from some online outfit. On checking, I didn't have a ground on the machine frame but do now, so if the card is blown, its my loss. I honestly thought I did have a solid ground, till I put a meter on it & read infinity. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
