According to the SRM page 94: DO NOT APPLY VOLTAGE TO ANY I/O PIN WHEN POWER IS NOT SUPPLIED TO THE BOARD. IT WILL DAMAGE THE PROCESSOR AND VOID THE WARRANTY. NO PINS ARE TO BE DRIVEN UNTIL AFTER THE SYS_RESET LINE GOES HIGH.
I hope to have a deeper understanding on that statement. Does that only apply to specific pins such as the boot config pins? My application requires beaglebone to be a secondary processor and it communicates with the primary processor using I2C and SPI. The beaglebone will bootup and shutdown occasionally while the primary processor will be on all the time. I am under the impression that the pins on the beaglebone should be on high impedance when beaglebone is powered down. With I2C pulled up by default and assuming I did attempt to drive the SPI bus when BBB is powered down, is that going to destroy the processor? -- 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.
