5
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verify that the Application Note or Technical Brief is current before proceeding.
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AN1407.0
January 23, 2009
If you disconnect the USB cable from J1, the IC will return to
Audio mode. You can now plug the headphone set into the
headphone jack. Turn the audio source ON to once again
play music.
Test Points
The board has various test points for ease of connecting
probes to make measurements. The test points available are
described in the following table.
DESIGNATOR
DESCRIPTION
TP1
V
DD
test point
TP2
Ground Test Point
TP3
V
BUS
Test Point
TP4
Audio Left Input Test Point
TP5
Audio Right Input Test Point
JP1
D-/D+ Differential Probe Connection - USB Device
Side of Switch
JP2
D-/D+ Differential Probe Connection - COM Side
of Switch
Application Note 1407
