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

Read the boot console

Connect a 3.3 V logic-level USB UART adapter. Cross TX to RX, share ground and leave adapter power disconnected.

Board transmit to adapter receive, board receive to adapter transmit, and common ground.UART adapterBoardRXJ1-5 TXTXJ1-4 RXGNDJ1-1

Bench checks

  • Use 115200 baud, 8 data bits, no parity and one stop bit.
  • Start the terminal before rebooting. Verify cable direction and logic level if the boot output is unreadable.

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

P8-23 · GPIO1_4

Multiplexed · GPIO

Board connector signal. Enable its peripheral or GPIO function in the operating system when the board supports it. AM335x pad and mux modes · U8: 0 gpmc_ad4, 1 mmc1_dat4, 7 gpio1[4].

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