User Manual

element14 is a trademark of Premier Farnell plc 62

LCD panels. If you choose to override these settings, it is strongly recommended that you

gate these signals with the

SYS_RESETn

signal. This ensures that after coming out of

reset these signals are removed from the expansion pins.

6.8 Default Boot Options

Based on the selected option found in

Figure 39

below, each of the boot sequences for

each of the two settings is shown.

Figure 39 Processor Boot Configuration

The first row in

Figure 39

is the default setting. On boot, the processor will look for the

eMMC on the MMC1 port first, followed by the microSD slot on MMC0, USB0 and UART0.

In the event there is no microSD card and the eMMC is empty, UART0 or USB0

could be used as the board source.

If you have a microSD card from which you need to boot from, hold the boot button

down. On boot, the processor will look for the SPIO0 port first, then microSD on the MMC0

port, followed by USB0 and UART0. In the event there is no microSD card and the eMMC

is empty, USB0 or UART0 could be used as the board source.

6.9 10/100 Ethernet

The e l e m e n t 1 4 BeagleBone Black is equipped with a 10/100 Ethernet interface. It

uses the same PHY as is used on the original BeagleBone. The design is described in the

following sections.