Belkin XM Commander Especificações Página 95

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REF: BB_SRM_xM BeagleBoard-xM System
Reference Manual
Revision A2
Page 95 of 164
8.19 S-Video
A single S-Video port is provided on the BeagleBoard. Figure 45 is the design of the S-
Video interface.
R34 0,DNI
P4
CONN_SVideo
P1
1
P2
2
P3
3
P4
4
5
MH1
6
MH2
7
MH3
C9
0.1uF,10V
L2
3.3uH
1 2
L3
3.3uH
1 2
R33 1.65K,1%
R32 1.65K,1%
C11
47pF
C10
47pF
U4BProcessor
TV_OU T2
W28
TV_OU T1
Y28
TV_VF B1
Y27
TV_VREF
W26
TV_VF B2
W27
Figure 45. S-Video Interface
Table 18 is the list of the signals on the S-Video interface and their definitions.
Table 18. S-Video Interface Signals
Signal
I/O
Description
tv_out1
O TV analog output composite
tv_out2
O TV analog output S-VIDEO
tv_vref
I Reference output voltage from internal bandgap
tv_vfb1
O Amplifier feedback node
tv_vfb2
O Amplifier feedback node
Power to the internal DAC is supplied by the TPS65950 via the VDAC_1V8 rail. Figure
37 reflects the filtering that is used on these rails, including the input VBAT rail.
A 47pf CAP and 3.3uh inductor are across the feedback resistors to improve the quality
of the S-Video signal.
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