ADV7188BSTZ Datasheet, PDF (14/112 Pages) Analog Devices – Multiformat SDTV Video Decoder with Fast Switch Overlay Support

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.
Table 9. Input Channel Switching Using INSEL [3:0]
INSEL
Description
[3:0]
Analog Input Pins
Video Format
0000
(default)
CVBS1 = AIN1
B = AIN4 or AIN7¹
R = AIN5 or AIN8¹
G = AIN6 or AIN9¹
SCART (CVBS and R, G, B)
0001
CVBS2 = AIN2
B = AIN4 or AIN7¹
R = AIN5 or AIN8¹
G = AIN6 or AIN9¹
SCART (CVBS and R, G, B)
0010
CVBS3 = AIN3
B = AIN4 or AIN7¹
R = AIN5 or AIN8¹
G = AIN6 or AIN9¹
SCART (CVBS and R, G, B)
0011
CVBS4 = AIN4
SCART (CVBS and R, G, B)
B = AIN7
R = AIN8
G = AIN9
0100
CVBS1 = AIN5
SCART (CVBS and R, G, B)
B = AIN4
R = AIN5
G = AIN6
0101
CVBS1 = AIN1
SCART (CVBS and R, G, B)
B = AIN4
R = AIN5
G = AIN6
0110
Y1 = AIN1
Y/C
C1 = AIN4
0111
Y2 = AIN2
Y/C
C2 = AIN5
1000
Y3 = AIN3
Y/C
C3 = AIN6
1001
Y1 = AIN1
YPrPb
PB1 = AIN4
PR1 = AIN5
1010
Y2 = AIN2
YPrPb
PB2 = AIN3
PR2 = AIN6
1011
CVBS7 = AIN7
SCART (CVBS and R, G, B)
B = AIN4
R = AIN5
1100
G = AIN6
CVBS8 = AIN8
SCART (CVBS and R, G, B)
B = AIN4
R = AIN5
G = AIN6
1101
CVBS9 = AIN9
SCART (CVBS and R, G, B)
B = AIN4
R = AIN5
G = AIN6
1110
CVBS10 = AIN10
B = AIN4 or AIN7¹
R = AIN5 or AIN8¹
G = AIN6 or AIN9¹
SCART (CVBS and R, G, B)
1111
CVBS11 = AIN11
B = AIN4 or AIN7¹
R = AIN5 or AIN8¹
G = AIN6 or AIN9¹
SCART (CVBS and R, G, B)
1 _{Selectable via RGB_IP_SEL.}
Rev. A | Page 14 of 112