The ADV7842 seems to cut off the top few "lines" when using the composite input, did the ADV7844 correct that issue or is it still present? Any other quality differences between the two or just more HDMI inputs on the ADV7844?
ADV7842
Recommended for New Designs
The ADV7842 is a dual HDMI 1.4 fast switching rReceiver with 12-Bit, 170 MHz video and graphics digitizer and 3D comb filter decoder. It is a highly flexible...
Datasheet
ADV7842 on Analog.com
ADV7844
Recommended for New Designs
The ADV7844 is a high quality, single-chip, 4:1 multiplexed HDMI receiver and graphics digitizer with an integrated multiformat video decoder.
The ADV7844...
Datasheet
ADV7844 on Analog.com
The ADV7842 seems to cut off the top few "lines" when using the composite input, did the ADV7844 correct that issue or is it still present? Any other quality differences between the two or just more HDMI inputs on the ADV7844?
Hi,
ADV7842 is the same part except it has 2 less HDMI inputs ports other than that there is no difference between ADV7842 and ADV7844.
Could you please share your register configuration with us.
Also please try with other Source and Sink.
Thanks,
Poornima
I have screen captures proving the issue but my post gets flagged when I try and show you.
wri2c 50 10 05
wri2c 50 11 08
wri2c 50 19 10
wri2c 50 1B 02
wri2c 40 FF 80
wri2c 40 F1 90
wri2c 40 F2 94
wri2c 40 F3 84
wri2c 40 F4 80
wri2c 40 F5 7C
wri2c 40 F8 4C
wri2c 40 F9 64
wri2c 40 FA 6C
wri2c 40 FB 68
wri2c 40 FD 44
wri2c 40 FE 48
wri2c 40 F1 90
wri2c 40 F2 94
wri2c 40 F3 84
wri2c 40 F4 80
wri2c 40 F5 7C
wri2c 40 F8 4C
wri2c 40 F9 64
wri2c 40 FA 6C
wri2c 40 FB 68
wri2c 40 FD 44
wri2c 40 FE 48
wri2c 50 20 00
wri2c 40 00 01
wri2c 40 01 00
wri2c 50 20 00
wri2c 40 03 00
wri2c 40 04 82
wri2c 40 0C 40
wri2c 40 15 80
wri2c 40 19 83
wri2c 40 33 40
wri2c 4C 00 0E
wri2c 4C 02 80
wri2c 4C 03 B0
wri2c 4C 0C 1F
wri2c 4C 12 63
wri2c 94 60 01
wri2c 94 7A A5
wri2c 94 7B 8F
wri2c 94 75 0A
wri2c 94 97 00
wri2c 94 B2 60
wri2c 90 00 7F
wri2c 90 01 00
wri2c 90 03 E4
wri2c 90 04 0B
wri2c 90 05 C3
wri2c 90 06 FE
wri2c 90 12 01
wri2c 90 34 20
wri2c 90 A7 00
wri2c 90 A9 B6
wri2c 90 AA B6
wri2c 72 01 00
wri2c 72 02 18
wri2c 72 03 00
wri2c 72 15 03
wri2c 72 16 E7
wri2c 72 18 46
wri2c 72 40 80
wri2c 72 41 10
wri2c 72 48 08
wri2c 72 49 A8
wri2c 72 4C 00
wri2c 72 55 20
wri2c 72 56 08
wri2c 72 96 20
wri2c 72 98 03
wri2c 72 99 02
wri2c 72 9C 30
wri2c 72 9D 61
wri2c 72 A2 A4
wri2c 72 A3 A4
wri2c 72 A5 44
wri2c 72 AB 40
wri2c 72 AF 16
wri2c 72 BA 60
wri2c 72 D1 FF
wri2c 72 DE 9C
wri2c 72 E4 60
wri2c 72 FA 7D
Hi, the forum denied your last post with a picture image link. (denied because of the link). I can't access that image either. CAn you find another way to get that image to this post
https://free image.host/i/Qf6W YX
See if this works, get rid of the spaces.
yes, I can see them image after I remove the spaces
So the Kramer (7842), Lumagen (7800), and 7842 Eval Board all have the missing lines but the Onkyo (7844) does not. Is this a register issue that can be corrected or a bug?
As Poornima stated, the ADV7844 and ADV7842 are the same die with just different bond outs and packages. There must be some differences in the registers. Can you dump both register sets and do a side by side comparison.
I cannot dump anything from the finished processors and do not have a 7844 eval board so I will try and figure out with the 7842 what might be wrong. Fair to assume that Onkyo corrected the issue and the others did not?
That would be my guess too. Check the vertical front and back porch settings
That would be my guess too. Check the vertical front and back porch settings
We figured out the register and fixed, you can close this issue.