BeagleBone Black System
Reference Manual
Page 76 of 108
7.5 Serial Header
Each board has a debug serial interface that can be accessed by using a special serial
cable that is plugged into the serial header as shown in Figure 48 below.
Figure 48. Serial Debug Header
Two signals are provided, TX and RX on this connector. The levels on these signals are
3.3V. In order to access these signals, a FTDI USB to Serial cable is recommended as
shown in Figure 49 below.
Figure 49. FTDI USB to Serial Adapter
The cable can be purchased from several different places and must be the 3.3V version
TTL-232R-3V3. Information on the cable itself can be found direct from FTDI at:
Serial Debug
Connector
Pin 1
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