Datasheet

Table Of Contents
ADV7188
Rev. A | Page 14 of 112
INSEL [3:0], Input Selection, Address 0x00 [3:0]
The INSEL bits allow the user to select the input channel and
format. Depending on the PCB connections, only a subset of
the INSEL modes is valid. INSEL [3:0] not only switches the
analog input muxing, but also configures the ADV7188 to process
composite (CVBS), S-video (Y/C), or component (YPbPr)
format signals.
The recommended input muxing is designed to minimize
crosstalk between signal channels and to obtain the highest
level of signal integrity.
Table 10 summarizes how the PCB
layout should connect analog video signals to the ADV7188.
It is strongly recommended that users connect any unused
analog input pins to AGND to act as a shield.
Connect the AIN7 to AIN11 inputs to AGND when only six
input channels are used. This improves the quality of the
sampling due to better isolation between the channels.
AIN12 is not controlled by INSEL [3:0]. It can be routed to
ADC0/ADC1/ADC2 only by manual muxing. See
Table 11
for details.
Table 9. Input Channel Switching Using INSEL [3:0]
Description
INSEL
[3:0]
Analog Input Pins Video Format
0000
(default)
CVBS1 = AIN1
B = AIN4 or AIN7
1
R = AIN5 or AIN8
1
G = AIN6 or AIN9
1
SCART (CVBS and R, G, B)
0001 CVBS2 = AIN2
B = AIN4 or AIN7
1
R = AIN5 or AIN8
1
G = AIN6 or AIN9
1
SCART (CVBS and R, G, B)
0010 CVBS3 = AIN3
B = AIN4 or AIN7
1
R = AIN5 or AIN8
1
G = AIN6 or AIN9
1
SCART (CVBS and R, G, B)
0011 CVBS4 = AIN4
B = AIN7
R = AIN8
G = AIN9
SCART (CVBS and R, G, B)
0100 CVBS1 = AIN5
B = AIN4
R = AIN5
G = AIN6
SCART (CVBS and R, G, B)
0101 CVBS1 = AIN1
B = AIN4
R = AIN5
G = AIN6
SCART (CVBS and R, G, B)
0110 Y1 = AIN1
C1 = AIN4
Y/C
0111 Y2 = AIN2
C2 = AIN5
Y/C
1000 Y3 = AIN3
C3 = AIN6
Y/C
1001 Y1 = AIN1
PB1 = AIN4
PR1 = AIN5
YPrPb
1010 Y2 = AIN2
PB2 = AIN3
PR2 = AIN6
YPrPb
1011 CVBS7 = AIN7
B = AIN4
R = AIN5
G = AIN6
SCART (CVBS and R, G, B)
1100 CVBS8 = AIN8
B = AIN4
R = AIN5
G = AIN6
SCART (CVBS and R, G, B)
1101 CVBS9 = AIN9
B = AIN4
R = AIN5
G = AIN6
SCART (CVBS and R, G, B)
1110 CVBS10 = AIN10
B = AIN4 or AIN7
1
R = AIN5 or AIN8
1
G = AIN6 or AIN9
1
SCART (CVBS and R, G, B)
1111 CVBS11 = AIN11
B = AIN4 or AIN7
1
R = AIN5 or AIN8
1
G = AIN6 or AIN9
1
SCART (CVBS and R, G, B)
1
Selectable via RGB_IP_SEL.