It is in the data sheet, not the TRM. Table 4-1, columns 7 and 8.
Gerald On Tue, Dec 15, 2015 at 2:52 PM, Bill Gray <[email protected]> wrote: > Gerald, > > Thanks so much. > > How interesting! I suppose I can just cold boot the BBB and see which > pins are where to figure out where things start, but I would love to read > up more on this given that my hardware could get bricked if something were > to change. > > Since I got your reply I've been pouring over the Technical Reference > Manual, but I am not able to find a discussion of default pin states > anywhere... could you throw me another clue to where I can find this info? > > Thanks again. > > Bill > > On Tuesday, December 15, 2015 at 11:35:20 AM UTC-8, Gerald wrote: >> >> The datasheet tells you the default for all the pins on power up. Some >> are high and some are low. Until the SW changes that, they stay and the >> preset levels. >> >> http://www.ti.com/product/am3358 >> >> >> Gerald >> >> On Tue, Dec 15, 2015 at 12:04 PM, Bill Gray <[email protected]> wrote: >> >>> Hi, >>> >>> I'm developing a system that uses PRU 1 to send a PWM to a switched mode >>> power converter. >>> >>> When I first turn the system on, I want the PWM signal to be low. If >>> the pin is high, I will pretty much surely blow my mosfets as current >>> surges through my circuit. >>> >>> For some reason, when I first turn things on the pin runs to high... I'm >>> not sure why. >>> >>> This is before I start messing around with the device tree or anything. >>> Cold boot. I apply power and even before the LEDs light up I can see that >>> the pin in question runs high. >>> >>> Is there anyway I can control this behavior? >>> >>> Thanks, >>> >>> Bill >>> >>> -- >>> 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/d/optout. >>> >> >> >> >> -- >> Gerald >> >> [email protected] >> http://beagleboard.org/ >> > -- > 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/d/optout. > -- Gerald [email protected] http://beagleboard.org/ -- 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/d/optout.
