Correct. Unless you want to change the boot mode. Gerald
On Tue, Oct 29, 2013 at 9:05 AM, <[email protected]> wrote: > So I should not input high,low either . > I undertood. Thank you. > > 2013年10月28日月曜日 22時14分01秒 UTC+9 Gerald: >> >> A. The pins cannot float. They are already terminated on the board, >> either hi or lo. >> >> Gerald >> >> >> >> On Sun, Oct 27, 2013 at 9:46 PM, <[email protected]> wrote: >> >>> Hi, >>> Please tell me about correct circuitry to use boot pins as input, >>> >>> I use Beaglbone Black and want to use these pins, >>> especially eQep counter pins P8-33,35,41,42 that match to SYS_BOOT >>> 4,5,12,13. >>> >>> In SRM (ver A6) p104 it says, >>> "If you plan to use any of these signals, then on power up, these pins >>> should not be driven." >>> >>> Which of below is correct circuitry? >>> A) Attach pins to ground until SYS_RESETn goes high. >>> B) Keep pins floated until SYS_RESETn goes high. >>> >>> A is easier, because it can be done by switching 1 relay pulling all >>> pins to ground. >>> For B, I need plenty relays. >>> >>> Thanks, >>> Tohru >>> >>> >>> 2013年4月12日金曜日 4時20分23秒 UTC+9 DarkHelmet: >>> >>>> You can absolutely use them for other usages, once the value has been >>>> latched at boot they can be re purposed It may be necessary >>>> to strengthen the pull up/down on those lines with external resistors >>>> though. I've encountered an issue where my TTL inputs were pulling the >>>> lines low at boot while the CPU latched the config, preventing it to boot >>>> from the correct configuration. Resistors of ~50k seem to do the trick. >>>> >>>> On Friday, April 5, 2013 6:04:18 AM UTC-4, [email protected] wrote: >>>>> >>>>> Hi, >>>>> >>>>> I've a beaglebone with the XAM3359Z0Z, >>>>> >>>>> >>>>> I discovered that there is 19 pins dedicated to the boot configuration. >>>>> The documentation said that depending of the position of the switch, >>>>> The beaglebone will boot with the sd card, uart, ..... . >>>>> ( http://processors.wiki.ti.**co**m/index.php/AM335X_**StarterWare** >>>>> _Booting_And_**Flashing#Boot_**Modes<http://processors.wiki.ti.com/index.php/AM335X_StarterWare_Booting_And_Flashing#Boot_Modes> >>>>> ) >>>>> >>>>> >>>>> I wanted to know if it is possible to use these pins for an another >>>>> usage? How ? I don't need an another boot mode, the default one is enough >>>>> for me. >>>>> >>>>> >>>>> >>>>> Thank you in advance for your help, >>>>> >>>> -- >>> 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 beagleboard...@**googlegroups.com. >>> >>> For more options, visit >>> https://groups.google.com/**groups/opt_out<https://groups.google.com/groups/opt_out> >>> . >>> >> >> -- > 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]. > For more options, visit https://groups.google.com/groups/opt_out. > -- 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]. For more options, visit https://groups.google.com/groups/opt_out.
