Spark Logic

BeagleBone Black Rev C connection guide

BeagleBone Black Rev C BeagleBone Black Rev C wiring guide with power, signal assignments, and bench checks.

BeagleBone Black Rev C

98 contacts Current package

BeagleBoard.org · Sitara AM3358 · P8/P9 46-position expansion headers · J1 serial header

Power through the DC jack

Required

Power the board only through the 2.1 mm center-positive barrel jack for this fixture. Use a regulated 5 V, 2 A adapter and leave the UART adapter power wire disconnected.

  • Board supply
    • 5 V source
    • the 2.1 mm center-positive barrel jack 5 V contact
  • Board return
    • Supply return
    • the 2.1 mm center-positive barrel jack ground
    • GND (P9-1)
    • Meter COM
  • 3.3 V check

Bench checks

  • Verify the supply polarity and connector before plugging in. With the board powered, measure the regulated 3.3 V rail against ground.
  • Confirm a normal power indicator or boot message before adding accessories.

BeagleBone Black SRM, Connectors

Connection scenarios

Connect a 3.3 V I²C peripheral

Use a peripheral whose data and clock lines are compatible with 3.3 V and share ground. Power the module from a separate regulated 3.3 V source within its operating limits. Pull SDA and SCL to the shared 3.3 V logic domain if the bus does not already have suitable pull-ups.

Peripheral SDA and SCL connect to the board I²C signals with common ground. Check the pull-ups and separate 3.3 V supply.PeripheralBoardSDAP9-20SCLP9-19GNDP9-1

Bench checks

  • Use the Linux adapter mapped to I²C2. Choose an address that does not conflict with the cape EEPROMs or another attached board.
  • Power the board and peripheral together. Check that both bus lines idle near 3.3 V, then query a documented register at the peripheral’s known address.

BeagleBone Black SRM, Connectors

BeagleBone Black Rev C wiring map

Highlighted contacts are used in the required step or selected circuit. Select a contact to inspect it.

P9 expansion header
Component-side numbering. Match the pin 1 mark and the P9 connector designator.
P8 expansion header
Component-side numbering. Match the pin 1 mark and the P8 connector designator.
J1 serial debug header
Ground is pin 1. Align the connector against the PCB pin-1 index.
Selected pin details

P9-1 · GND

Return · Ground

Board ground return.

BeagleBone Black SRM, Connectors

Electrical limits · Pin in the reference

Models and documents

The map covers Rev C P8, P9 and J1. Pinmux modes are processor alternatives. Check the running device tree and onboard eMMC/HDMI usage before reassigning a line.

BeagleBone Black Rev C
Sitara AM3358 · P8/P9 46-position expansion headers · J1 serial header