User Manual

element14 is a trademark of Premier Farnell plc 32

DDR3L requires 1.5V instead of 1.8V on the DDR2 as is the case on the original

BeagleBone. The 1.8V regulator setting has been changed to 1.5V for the DDR3L. The

LDO3 3.3V rail has been changed to 1.8V to support those rails on the processor. LDO4

is still 3.3V for the 3.3V rails on the processor. An external

LDOTLV70233

provides the

3.3V rail for the rest of the board.

5.5 PC USB Interface

The board has a miniUSB connector that connects the USB0 port to the processor. This is

the same connector as used on the original BeagleBone.

5.6 Serial Debug Port

Serial debug is provided via UART0 on the processor via a single 1x6 pin header. In

order to use the interface a USB to TTL adapter will be required. The header is

compatible with the one provided by FTDI and can be purchased for about $12 to $20

from various sources. Signals supported are TX and RX. None of the handshake signals

are supported.

5.7 USB1 Host Port

On the board is a single USB Type A female connector with full LS/FS/HS Host support

that connects to USB1 on the processor. The port can provide power on/off control and

up to 500mA of current at 5V. Under USB power, the board will not be able to supply the

full 500mA, but should be sufficient to supply enough current for a lower power USB

device supplying power between 50 to 100mA.

You can use a wireless keyboard/mouse configuration or you can add a HUB for standard

keyboard and mouse interfacing.

5.8 Power Sources

The board can be powered from four different sources:

•

A USB port on a PC

•

A 5VDC 1A power supply plugged into the DC connector.

•

A power supply with a USB connector.

•

Expansion connectors

The USB cable is shipped with each board. This port is limited to 500mA by the Power

Management IC. It is possible to change the settings in the

TPS65217C

to increase this

current, but only after the initial boot. And, at that point the PC most likely will complain,

but you can also use a dual connector USB cable to the PC to get to 1A.

The power supply is not provided with the board but can be easily obtained from

numerous sources. A 1A supply is sufficient to power the board, but if there is a cape