adv7188 Analog Devices, Inc., adv7188 Datasheet - Page 14

• Manufacturer Part Number: adv7188
• Description: Multiformat Sdtv Video Decoder With Fast Switch Overlay Support
• Manufacturer: Analog Devices, Inc.

ADV7188
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.
Rev. A | Page 14 of 112
Table 9. Input Channel Switching Using INSEL [3:0]
INSEL
[3:0]
0000
(default)
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
1
Selectable via RGB_IP_SEL.
Analog Input Pins
CVBS1 = AIN1
B = AIN4 or AIN7
R = AIN5 or AIN8
G = AIN6 or AIN9
CVBS2 = AIN2
B = AIN4 or AIN7
R = AIN5 or AIN8
G = AIN6 or AIN9
CVBS3 = AIN3
B = AIN4 or AIN7
R = AIN5 or AIN8
G = AIN6 or AIN9
CVBS4 = AIN4
B = AIN7
R = AIN8
G = AIN9
CVBS1 = AIN5
B = AIN4
R = AIN5
G = AIN6
CVBS1 = AIN1
B = AIN4
R = AIN5
G = AIN6
Y1 = AIN1
C1 = AIN4
Y2 = AIN2
C2 = AIN5
Y3 = AIN3
C3 = AIN6
Y1 = AIN1
PB1 = AIN4
PR1 = AIN5
Y2 = AIN2
PB2 = AIN3
PR2 = AIN6
CVBS7 = AIN7
B = AIN4
R = AIN5
G = AIN6
CVBS8 = AIN8
B = AIN4
R = AIN5
G = AIN6
CVBS9 = AIN9
B = AIN4
R = AIN5
G = AIN6
CVBS10 = AIN10
B = AIN4 or AIN7
R = AIN5 or AIN8
G = AIN6 or AIN9
CVBS11 = AIN11
B = AIN4 or AIN7
R = AIN5 or AIN8
G = AIN6 or AIN9
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Description
Video Format
SCART (CVBS and R, G, B)
SCART (CVBS and R, G, B)
SCART (CVBS and R, G, B)
SCART (CVBS and R, G, B)
SCART (CVBS and R, G, B)
SCART (CVBS and R, G, B)
Y/C
Y/C
Y/C
YPrPb
YPrPb
SCART (CVBS and R, G, B)
SCART (CVBS and R, G, B)
SCART (CVBS and R, G, B)
SCART (CVBS and R, G, B)
SCART (CVBS and R, G, B)