Hello.
I have questions about AIN and ADC assignment for video input of ADV7181D.
The customer is going to use ADV7181D with four CVBS inputs and one s-video(Y/C).
I'm suggesting the assignments as follows:
AIN1 : CVBS (ADC0 is used, INSEL=1011, PRIM_MODE=0000, SEM_SEL=00, VID_STD=0010)
AIN2 : Y (ADC0 is used, INSEL=0110, PRIM_MODE=0000, SEM_SEL=00, VID_STD=0010)
AIN3 : CVBS (ADC0 is used, INSEL=0001, PRIM_MODE=0000, SEM_SEL=00, VID_STD=0010)
AIN4 : CVBS (ADC0 is used, INSEL=1101, PRIM_MODE=0000, SEM_SEL=00, VID_STD=0010)
AIN5 : CVBS (ADC0 is used, INSEL=0010, PRIM_MODE=0000, SEM_SEL=00, VID_STD=0010)
AIN6 : C (ADC1 is used, INSEL=0110, PRIM_MODE=0000, SEM_SEL=00, VID_STD=0010)
AIN7 : unused (connect to AGND)
AIN8 : unused (connect to AGND)
AIN9 : unused (connect to AGND)
AIN10: unused (connect to AGND)
Question 1:
About AIN1, there is a description of "INSEL = 1011" at "CVBS in on AIN1" on "Table 63 Register 0x00" on H/W manual.
But on "Table 4 Recommended ADC Mapping", there is a description of "INSEL = 0000" at "CVBS in on AIN1".
Which is correct?
I think that "INSEL = 1011 at CVBS in on AIN1" is correct as long as I had evaluated it on your eval board.
Question 2:
The customer doesn't use ADC2 and ADC3 because of reduction of Icc.
I think above assignments are OK, but if we have any problem, please let me know.
Thank you!
Best regards.