beaglebone-black - Flipbook - Page 70
Chapter 7
Connectors
This section describes each of the connectors on the board.
7.1 Expansion Connectors
The expansion interface on the board is comprised of two 46 pin connectors. All signals on the expansion
headers are _3.3V_ unless otherwise indicated.
NOTE: Do not connect 5V logic level signals to these pins or the board will be damaged.
NOTE: 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.
The location and spacing of the expansion headers are the same as on the original BeagleBone.
7.1.1 Connector P8
table-12 shows the pinout of the P8 expansion header. Other signals can be connected to this connector based
on setting the pin mux on the processor, but this is the default settings on power up. The SW is responsible
for setting the default function of each pin. There are some signals that have not been listed here. Refer to
the processor documentation for more information on these pins and detailed descriptions of all of the pins
listed. In some cases there may not be enough signals to complete a group of signals that may be required to
implement a total interface.
The PROC column is the pin number on the processor.
The PIN column is the pin number on the expansion header.
The MODE columns are the mode setting for each pin. Setting each mode to align with the mode column will
give that function on that pin.
NOTE: 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.
65
