ADV7181D datasheet(17/24 Pages) AD

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Data Sheet

ADV7181D

Rev. 0 | Page 17 of 24

The analog input muxes of the ADV7181D must be controlled

directly. This is referred to as manual input muxing. The manual

muxing is activated by setting the ADC_SW_MAN_EN bit (see

Table 9). It affects only the analog switches in front of the ADCs.

The INSEL, SDM_SEL, PRIM_MODE, and VID_STD bits must

still be set so that the follow-on blocks process the video data in

the correct format.

Not every input pin can be routed to any ADC. The analog

signal routing inside the IC imposes restrictions on the channel

routing. See Table 9 for an overview of the routing capabilities

inside the chip. The four mux sections can be controlled by the

reserved control signal buses ADC0_SW[3:0], ADC1_SW[3:0],

ADC2_SW[3:0], and ADC3_SW[3:0].

Table 9 explains the ADC mapping configuration for the following:

•

ADC_SW_MAN_EN, manual input muxing enable,

IO map, Address C4[7]

•

ADC0_SW[3:0], ADC0 mux configuration, IO map,

Address C3[3:0]

•

ADC1_SW[3:0], ADC1 mux configuration, IO map,

Address C3[7:4]

•

ADC2_SW[3:0], ADC2 mux configuration, IO map,

Address C4[3:0]

•

ADC3_SW[3:0], ADC3 mux configuration, IO map,

Address F3[7:4]

Table 9. Manual MUX Settings for All ADCs

ADC_SW_MAN_EN = 1

ADC0_SW[3:0]

ADC0

Connection

ADC1_SW[3:0]

ADC1

Connection

ADC2_SW[3:0]

ADC2

Connection

ADC3_SW[3:0]

ADC3

Connection

0000

N/A

0000

N/A

0000

N/A

0000

N/A

0001

AIN2

0001

N/A

0001

N/A

0001

N/A

0010

AIN3

0010

N/A

0010

AIN3

0010

N/A

0011

AIN5

0011

AIN5

0011

N/A

0011

N/A

0100

AIN6

0100

AIN6

0100

AIN6

0100

AIN6

0101

AIN8

0101

AIN8

0101

AIN8

0101

N/A

0110

AIN10

0110

AIN10

0110

AIN10

0110

N/A

0111

N/A

0111

N/A

0111

N/A

0111

N/A

1000

N/A

1000

N/A

1000

N/A

1000

N/A

1001

AIN1

1001

N/A

1001

N/A

1001

AIN1

1010

N/A

1010

N/A

1010

N/A

1010

N/A

1011

AIN4

1011

AIN4

1011

N/A

1011

N/A

1100

N/A

1100

N/A

1100

N/A

1100

N/A

1101

AIN7

1101

AIN7

1101

AIN7

1101

N/A

1110

AIN9

1110

AIN9

1110

AIN9

1110

N/A

1111

N/A

1111

N/A

1111

N/A

1111

N/A

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