5
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AN1358.0
June 23, 2008
disconnects the RCA connectors (J5 and J7) and the
BNC connectors (J6 and J8) from the USB differential
lines. These components when connected will degrade
the USB signal.
These components will not be there in an
actual application. Note: R
3
and R
4
are located on the
underside of the board.
If you disconnect the USB cable from J4 the IC will return to
Audio mode. You can now plug the TV monitor into J5 and
J7, turn the audio/video of the player ON to once again play
the music video or movie.
Test Points
The evaluation board has various test points for ease of
connecting probes to make measurements. The test points
available are described in Table 1.
Board Schematic
TABLE 1. TEST POINT DESCRIPTIONS
DESIGNATOR
DESCRIPTION
TP1
V
DD
test point
TP2
Ground Test Point
TP3
V
BUS
Test Point
TP4
VIDEO IN Test Point
TP5
MONO AUDIO IN Test Point
JP1
D-/D+ Differential Probe Connection - USB Device
Side of Switch
JP2
D-/D+ Differential Probe Connection - HOST Side
of Switch
IN
MONO AUDIO
OUT
USB
HOST
VDD
D-
D+
GND
CTRL
TO
TO
USB
DIFF
ADAPTER
PROBE
DIFF
DEVICE
VBUS
VIDEO
IN
MONO AUDIO
IN
PROBE
ADAPTER
VIDEO
OUT
4
3
2
1
J7
4
3
2
1
J5
4
3
2
1
JP1
4
3
2
1
JP2
R5
R6
R7
9
8
7
6
5
4
3
2
1
1
J3
C5
5
4
3
2
1
J10
5
4
3
2
1
J9
R2
R1
R4
R3
C4
C3
6
5
4
3
2
1
J4
C2
C1
1
TP5
1
TP4
1
TP3
1
TP2
1
TP1
1
J11
1
J1
1
J2
5
4
3
2
1
J8
5
4
3
2
1
J6
4
3
2
1
J15
4
3
2
1
J13
5
4
3
2
1
J16
5
4
3
2
1
J14
6
5
4
3
2
1
J1
2
897
-30-
004
-90
-000
D+
COM2
OP
EN
L
DNP
D-
DNP
COM1
DNP
0
100UF
DNP
10UF
VDD
0.1UF
R
0
100UF
DNP
U1
10
MOUNT
1
US
B
T
YP
E
A
2
3
4
MOUNT
USB
1
MOUNT
2
3
4
MOUNT
A
A
A
A
A
5
PACKAGE
10 PIN
QFN
1
2
3
46
7
8
9
10
A
A
A
A
A
A
A
A
A
A
A
A
A
Application Note 1358
