On Wed, 31 Mar 2021 02:46:53 -0700 (PDT), in
gmane.comp.hardware.beagleboard.user "'Adam' via BeagleBoard"
<beagleboard-/jypxa39uh5tlh3mboc...@public.gmane.org> wrote:
>
>Hi,
>
>I'm using a BBB with Debian on an SD card, and am having issues booting up
>whilst Pin 31 on P8 is held low.
>
>When P8.31 is held high, i.e. held at 3V3, or not connected to anything,
>the normal boot-up sequence occurs. I can see LEDs D2 to D5 flashing, and
>can see the standard boot-up output from the debug serial connection on my
>terminal emulator.
>
From the BBB SRM:
"""
* These pins are also the SYSBOOT pins. DO NOT drive them before the
SYS_RESETN signal goes high. If you do, the board may not boot because you
would be changing the boot order of the processor.
"""
SYSBOOT 14-15 appear to define the crystal frequency. See SPRUH73P (TRM)
table 26-7
--
Dennis L Bieber
--
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