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Chapter 3: Motherboard Connections
Rear I/O Ports
See the figure below for the locations and descriptions of the I/O ports on the rear of the
system.
Audio Speaker Output
The Audio Speaker Output (JSPKR1) is used to amplify low-power electronic audio signals
to a level that is high enough for current driving of loudspeakers or headphones.
Audio Speaker Output
JSPKR1 Pin Definitions
Pin#
Definition
1
SPEAKER_LN_OUT
2
SPEAKER_LP_OUT
3
SPEAKER_RN_OUT
4
SPEAKER_RP_OUT
GPIO D-SUB Connector
The GPIO D-SUB connector is an 8-bit general purpose I/O expander via the SMBus.
