On 4/30/2014 4:13 AM, Udayanto Dwi Atmojo wrote: > > Hi, > > The BB itself has its HDMI disabled, thus I assume there's no conflicting > pins when using the cape. The cape itself utilizes P8_01, P8_02, P8_27 > until P8_34 and P9_01, P9_02, and P9_21 until P9_28. The cape gets its > power not from the power adapter from the BB but from another power supply, > thus it doesn't absorb power from the BB at all. But even with having the > cape unpowered, the BB still cant finish booting the kernel. If it somehow > adjusting boot mode, which pin number that (if any being used by the cape) > is being used by the BB for kernel booting?
All of the LCD/HDMI pins are used to set the boot mode and cannot be driven until after reset goes high unless you are intentionally trying to change the boot mode. This is covered in the SRM, see section 8.1.1 "LCD Pins": * 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. More details are available in 8.3.1 "Boot Pins" and on the schematic. -- Charles Steinkuehler [email protected] -- 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.
