DS90UB947-Q1: Screen flicker in aftermarket

Liang Ming

Hello

We use 947+948 for instrument cluster display solution, but we find serveral aftermarket case with screen flcliker(about 10pcs), basic info as below:

1. Environment temp: Around 25dec, and PCB temp around 40dec

2. Failure Time: First time ignition on

3. Recovery condition : Re-Ignition on

BTW, we have apply the workaroung solution which was descried in Errata V1.9

Now we want to know whether you have some suggestion about this ?

over 3 years ago

0 William Yi over 3 years ago

TI__Expert 4160 points

Hi Liang,

1. it looks like this is within operating temperature so it is OK.

2. Is it with every screen that you have tested that you have seen this flickering?

if not, On which screens does the screen flicker with the 947 and 948 and their timings? On which screens does the screen not flicker with the 947 and 948 and their timings?

3. Does reignition mean the screen goes through an entire power cycle before it is fixed? What does reignition mean?

Does this mean it does not happen every power cycle?

If does not happen every power cycle, what is the percentage of times does this screen flicking occur? 10 percent? 30 percent?

Please tell me how the 947 and 948 is setup. What modes are they set in? Do you have register dumps?

Resspectfully,

William Y.

0 Liang Ming over 3 years ago in reply to William Yi

Prodigy 30 points

Hello William

Thank you for your reply

1. currently about 1% screens will flicker for one time , but the phenomemon will not happened any more , we are still trying to repeat the action

2. Yes, re-ignition means the screen will enter an power cycle , and will not happen in every power cycle

3. Attach with our 947 int code and Schematic Design , current with dual link and stp mode

3821.pdf 947参数更改详细信息.xls

0 William Yi over 3 years ago in reply to Liang Ming

TI__Expert 4160 points

Hi Liang,

I am reviewing your code and the schematic design.

Could you please provide a register dump of when the screen is in the flickering state and when the screen is not in flickering state?

Could you take a picture (video would be better) of the screen during flickering state? Also, are you able to replicate the screen flickering?

Does this also happen when you are using internal Patgen instead of the video data you are sending?

Respectfully,

William Y.

0 Liang Ming over 3 years ago in reply to William Yi

Prodigy 30 points

Hello

Today we have repeat one time faiure phenomeno,attach with the video, and dump the 947 and 948 data at NG time.

We find only the difference with 0X0A register, seems CRC error differnece.

Also we have done the below action:

1. reset the 948, the result NG

2. change a new LVDS cabele , the result NG

3.change a new screen panel ,the result NG

Before we reset the 947, wthether we coud do more ? Whether we have more explanation about CRC difference？

Fullscreen ti947_reg_value_NG.txt Download

data: 0h
Data recvd: 18h
data: 1h
Data recvd: 0h
data: 2h
Data recvd: 0h
data: 3h
Data recvd: deh
data: 4h
Data recvd: 80h
data: 5h
Data recvd: 0h
data: 6h
Data recvd: 58h
data: 7h
Data recvd: 34h
data: 8h
Data recvd: 34h
data: 9h
Data recvd: 0h
data: ah
Data recvd: 2h
data: bh
Data recvd: 0h
data: ch
Data recvd: 17h
data: dh
Data recvd: 23h
data: eh
Data recvd: 33h
data: fh
Data recvd: 3h
data: 10h
Data recvd: 0h
data: 11h
Data recvd: 0h
data: 12h
Data recvd: 0h
data: 13h
Data recvd: cch
data: 14h
Data recvd: 0h
data: 15h
Data recvd: 1h
data: 16h
Data recvd: 20h
data: 17h
Data recvd: 1eh
data: 18h
Data recvd: 7fh
data: 19h
Data recvd: 7fh
data: 1ah
Data recvd: 1h
data: 1bh
Data recvd: 0h
data: 1ch
Data recvd: 0h
data: 1dh
Data recvd: 0h
data: 1eh
Data recvd: 1h
data: 1fh
Data recvd: 0h
data: 20h
Data recvd: bh
data: 15h
Data recvd: 1h
data: 16h
Data recvd: 20h
data: 17h
Data recvd: 1eh
data: 18h
Data recvd: 7fh
data: 19h
Data recvd: 7fh
data: 1ah
Data recvd: 1h
data: 1bh
Data recvd: 0h
data: 1ch
Data recvd: 0h
data: 1dh
Data recvd: 0h
data: 1eh
Data recvd: 1h
data: 1fh
Data recvd: 0h
data: 20h
Data recvd: bh
data: 21h
Data recvd: 0h
data: 22h
Data recvd: 25h
data: 23h
Data recvd: 0h
data: 24h
Data recvd: 0h
data: 25h
Data recvd: 0h
data: 26h
Data recvd: 0h
data: 27h
Data recvd: 0h
data: 28h
Data recvd: 1h
data: 29h
Data recvd: 20h
data: 2ah
Data recvd: 20h
data: 2bh
Data recvd: b8h
data: 2ch
Data recvd: 0h
data: 2dh
Data recvd: 0h
data: 2eh
Data recvd: a5h
data: 2fh
Data recvd: 5ah
data: 30h
Data recvd: 0h
data: 31h
Data recvd: 0h
data: 32h
Data recvd: 0h
data: 33h
Data recvd: 0h
data: 34h
Data recvd: 0h
data: 35h
Data recvd: 0h
data: 36h
Data recvd: 0h
data: 37h
Data recvd: 0h
data: 38h
Data recvd: 0h
data: 26h
Data recvd: 0h
data: 40h
Data recvd: 10h
data: 41h
Data recvd: 49h
data: 42h
Data recvd: 0h
data: 48h
Data recvd: 0h
data: 49h
Data recvd: 0h
data: 4bh
Data recvd: 0h
data: 4fh
Data recvd: 80h
data: 50h
Data recvd: 16h
data: 54h
Data recvd: 2h
data: 55h
Data recvd: 0h
data: 57h
Data recvd: 2h
data: 3ch
Data recvd: 0h
data: 3dh
Data recvd: 0h
data: 3eh
Data recvd: 0h
data: 3fh
Data recvd: 0h
data: 40h
Data recvd: 10h
data: 41h
Data recvd: 49h
data: 42h
Data recvd: 0h
data: 43h
Data recvd: 0h
data: 44h
Data recvd: 80h
data: 45h
Data recvd: 0h
data: 46h
Data recvd: 63h
data: 47h
Data recvd: 0h
data: 48h
Data recvd: 0h
data: 49h
Data recvd: 0h
data: 4ah
Data recvd: 0h
data: 4bh
Data recvd: 0h
data: 4ch
Data recvd: 0h
data: 4dh
Data recvd: 0h
data: 4eh
Data recvd: 0h
data: 4fh
Data recvd: 80h
data: 50h
Data recvd: 16h
data: 51h
Data recvd: 0h
data: 52h
Data recvd: 0h
data: 53h
Data recvd: 0h
data: 54h
Data recvd: 2h
data: 55h
Data recvd: 0h
data: 56h
Data recvd: 0h
data: 57h
Data recvd: 2h
data: 58h
Data recvd: 0h
data: 59h
Data recvd: 0h
data: 5ah
Data recvd: cdh
data: 5bh
Data recvd: 0h
data: 5ch
Data recvd: 2h
data: 5dh
Data recvd: 6h
data: 5eh
Data recvd: 44h
data: 5fh
Data recvd: 5ah
data: 60h
Data recvd: 22h
data: 61h
Data recvd: 2h
data: 62h
Data recvd: 0h
data: 63h
Data recvd: 0h
data: 64h
Data recvd: 10h
data: 65h
Data recvd: 0h
data: 66h
Data recvd: 0h
data: 67h
Data recvd: 0h
data: 68h
Data recvd: 0h
data: 69h
Data recvd: 0h
data: 6ah
Data recvd: 0h
data: 6bh
Data recvd: 0h
data: 6ch
Data recvd: 0h
data: 6dh
Data recvd: 0h
data: 6eh
Data recvd: 0h
data: 6fh
Data recvd: 0h
data: 70h
Data recvd: 0h
data: 71h
Data recvd: 0h
data: 72h
Data recvd: 0h
data: 73h
Data recvd: 0h
data: 74h
Data recvd: 0h
data: 75h
Data recvd: 0h
data: 76h
Data recvd: 0h
data: 77h
Data recvd: 0h
data: 78h
Data recvd: 0h
data: 79h
Data recvd: 0h
data: 7ah
Data recvd: 0h
data: 7bh
Data recvd: 0h
data: 7ch
Data recvd: 0h
data: 7dh
Data recvd: 0h
data: c2h
Data recvd: 80h
data: c6h
Data recvd: 0h
data: c7h
Data recvd: 60h
data: c8h
Data recvd: c0h
data: 0h
Data recvd: 18h
data: 1h
Data recvd: 0h
data: 2h
Data recvd: 0h
data: 3h
Data recvd: deh
data: 4h
Data recvd: 80h
data: 5h
Data recvd: 0h
data: 6h
Data recvd: 58h
data: 7h
Data recvd: 34h
data: 8h
Data recvd: 34h
data: 9h
Data recvd: 0h
data: ah
Data recvd: 2h
data: bh
Data recvd: 0h
data: ch
Data recvd: 17h
data: dh
Data recvd: 23h
data: eh
Data recvd: 33h
data: fh
Data recvd: 3h
data: 10h
Data recvd: 0h
data: 11h
Data recvd: 0h
data: 12h
Data recvd: 0h
data: 13h
Data recvd: cch
data: 14h
Data recvd: 0h
data: 15h
Data recvd: 1h
data: 16h
Data recvd: 20h
data: 17h
Data recvd: 1eh
data: 18h
Data recvd: 7fh
data: 19h
Data recvd: 7fh
data: 1ah
Data recvd: 1h
data: 1bh
Data recvd: 0h
data: 1ch
Data recvd: 0h
data: 1dh
Data recvd: 0h
data: 1eh
Data recvd: 1h
data: 1fh
Data recvd: 0h
data: 20h
Data recvd: bh
data: 21h
Data recvd: 0h
data: 22h
Data recvd: 25h
data: 23h
Data recvd: 0h
data: 24h
Data recvd: 0h
data: 25h
Data recvd: 0h
data: 26h
Data recvd: 0h
data: 27h
Data recvd: 0h
data: 28h
Data recvd: 1h
data: 29h
Data recvd: 20h
data: 2ah
Data recvd: 20h
data: 2bh
Data recvd: b8h
data: 2ch
Data recvd: 0h
data: 2dh
Data recvd: 0h
data: 2eh
Data recvd: a5h
data: 2fh
Data recvd: 5ah
data: 30h
Data recvd: 0h
data: 31h
Data recvd: 0h
data: 32h
Data recvd: 0h
data: 33h
Data recvd: 0h
data: 34h
Data recvd: 0h
data: 35h
Data recvd: 0h
data: 36h
Data recvd: 0h
data: 37h
Data recvd: 0h
data: 38h
Data recvd: 0h
data: 39h
Data recvd: 0h
data: 3ah
Data recvd: 0h
data: 3bh
Data recvd: 0h
data: 3ch
Data recvd: 0h
data: 3dh
Data recvd: 0h
data: 3eh
Data recvd: 0h
data: 3fh
Data recvd: 0h
data: 40h
Data recvd: 10h
data: 41h
Data recvd: 49h
data: 42h
Data recvd: 0h
data: 43h
Data recvd: 0h
data: 44h
Data recvd: 80h
data: 45h
Data recvd: 0h
data: 46h
Data recvd: 63h
data: 47h
Data recvd: 0h
data: 48h
Data recvd: 0h
data: 49h
Data recvd: 0h
data: 4ah
Data recvd: 0h
data: 4bh
Data recvd: 0h
data: 4ch
Data recvd: 0h
data: 4dh
Data recvd: 0h
data: 4eh
Data recvd: 0h
data: 4fh
Data recvd: 80h
data: 50h
Data recvd: 16h
data: 51h
Data recvd: 0h
data: 52h
Data recvd: 0h
data: 53h
Data recvd: 0h
data: 54h
Data recvd: 2h
data: 55h
Data recvd: 0h
data: 56h
Data recvd: 0h
data: 57h
Data recvd: 2h
data: 58h
Data recvd: 0h
data: 59h
Data recvd: 0h
data: 5ah
Data recvd: cdh
data: 5bh
Data recvd: 0h
data: 5ch
Data recvd: 2h
data: 5dh
Data recvd: 6h
data: 5eh
Data recvd: 44h
data: 5fh
Data recvd: 5ah
data: 60h
Data recvd: 22h
data: 61h
Data recvd: 2h
data: 62h
Data recvd: 0h
data: 63h
Data recvd: 0h
data: 64h
Data recvd: 10h
data: 65h
Data recvd: 0h
data: 66h
Data recvd: 0h
data: 67h
Data recvd: 0h
data: 68h
Data recvd: 0h
data: 69h
Data recvd: 0h
data: 6ah
Data recvd: 0h
data: 6bh
Data recvd: 0h
data: 6ch
Data recvd: 0h
data: 6dh
Data recvd: 0h
data: 6eh
Data recvd: 0h
data: 6fh
Data recvd: 0h
data: 70h
Data recvd: 0h
data: 71h
Data recvd: 0h
data: 72h
Data recvd: 0h
data: 73h
Data recvd: 0h
data: 74h
Data recvd: 0h
data: 75h
Data recvd: 0h
data: 76h
Data recvd: 0h
data: 77h
Data recvd: 0h
data: 78h
Data recvd: 0h
data: 79h
Data recvd: 0h
data: 7ah
Data recvd: 0h
data: 7bh
Data recvd: 0h
data: 7ch
Data recvd: 0h
data: 7dh
Data recvd: 0h
data: 7eh
Data recvd: 0h
data: 7fh
Data recvd: 0h
data: 80h
Data recvd: 0h
data: 81h
Data recvd: 0h
data: 82h
Data recvd: 0h
data: 83h
Data recvd: 0h
data: 84h
Data recvd: 0h
data: 85h
Data recvd: 0h
data: 86h
Data recvd: 0h
data: 87h
Data recvd: 0h
data: 88h
Data recvd: 0h
data: 89h
Data recvd: 0h
data: 8ah
Data recvd: 0h
data: 8bh
Data recvd: 0h
data: 8ch
Data recvd: 0h
data: 8dh
Data recvd: 0h
data: 8eh
Data recvd: 0h
data: 8fh
Data recvd: 0h
data: 90h
Data recvd: 0h
data: 91h
Data recvd: 0h
data: 92h
Data recvd: 0h
data: 93h
Data recvd: 0h
data: 94h
Data recvd: 0h
data: 95h
Data recvd: 0h
data: 96h
Data recvd: 0h
data: 97h
Data recvd: 0h
data: 98h
Data recvd: 0h
data: 99h
Data recvd: 0h
data: 9ah
Data recvd: 0h
data: 9bh
Data recvd: 0h
data: 9ch
Data recvd: 0h
data: 9dh
Data recvd: 0h
data: 9eh
Data recvd: 0h
data: 9fh
Data recvd: 0h
data: a0h
Data recvd: 0h
data: a1h
Data recvd: 0h
data: a2h
Data recvd: 0h
data: a3h
Data recvd: 0h
data: a4h
Data recvd: 0h
data: a5h
Data recvd: 0h
data: a6h
Data recvd: 0h
data: a7h
Data recvd: 0h
data: a8h
Data recvd: 0h
data: a9h
Data recvd: 0h
data: aah
Data recvd: 0h
data: abh
Data recvd: 0h
data: ach
Data recvd: 0h
data: adh
Data recvd: 0h
data: aeh
Data recvd: 0h
data: afh
Data recvd: 0h
data: b0h
Data recvd: 0h
data: b1h
Data recvd: 0h
data: b2h
Data recvd: 0h
data: b3h
Data recvd: 0h
data: b4h
Data recvd: 0h
data: b5h
Data recvd: 0h
data: b6h
Data recvd: 0h
data: b7h
Data recvd: 0h
data: b8h
Data recvd: 0h
data: b9h
Data recvd: 0h
data: bah
Data recvd: 0h
data: bbh
Data recvd: 0h
data: bch
Data recvd: 0h
data: bdh
Data recvd: 0h
data: beh
Data recvd: 0h
data: bfh
Data recvd: 0h
data: c0h
Data recvd: 0h
data: c1h
Data recvd: 0h
data: c2h
Data recvd: 80h
data: c3h
Data recvd: 0h
data: c4h
Data recvd: 78h
data: c5h
Data recvd: 0h
data: c6h
Data recvd: 0h
data: c7h
Data recvd: 0h
data: c8h
Data recvd: c0h
data: c9h
Data recvd: 0h
data: cah
Data recvd: 0h
data: cbh
Data recvd: 0h
data: cch
Data recvd: 0h
data: cdh
Data recvd: 0h
data: ceh
Data recvd: ffh
data: cfh
Data recvd: 0h
data: d0h
Data recvd: 0h
data: d1h
Data recvd: 0h
data: d2h
Data recvd: 0h
data: d3h
Data recvd: 0h
data: d4h
Data recvd: 0h
data: d5h
Data recvd: 0h
data: d6h
Data recvd: 0h
data: d7h
Data recvd: 0h
data: d8h
Data recvd: 0h
data: d9h
Data recvd: 0h
data: dah
Data recvd: 0h
data: dbh
Data recvd: 0h
data: dch
Data recvd: 0h
data: ddh
Data recvd: 0h
data: deh
Data recvd: 0h
data: dfh
Data recvd: 0h
data: e0h
Data recvd: 0h
data: e1h
Data recvd: 0h
data: e2h
Data recvd: 80h
data: e3h
Data recvd: 0h
data: e4h
Data recvd: 68h
data: e5h
Data recvd: 38h
data: e6h
Data recvd: 0h
data: e7h
Data recvd: 0h
data: e8h
Data recvd: 0h
data: e9h
Data recvd: 0h
data: eah
Data recvd: 0h
data: ebh
Data recvd: 0h
data: ech
Data recvd: 0h
data: edh
Data recvd: 0h
data: eeh
Data recvd: 0h
data: efh
Data recvd: 0h
data: f0h
Data recvd: 5fh
data: f1h
Data recvd: 55h
data: f2h
Data recvd: 42h
data: f3h
Data recvd: 39h
data: f4h
Data recvd: 34h
data: f5h
Data recvd: 37h
data: 40h 11h
Data recvd:
data: 41h 47h
Data recvd:
data: 42h
Data recvd: 0h
data: 41h 4ah
Data recvd:
data: 42h
Data recvd: 3fh
data: 41h 4bh
Data recvd:
data: 42h
Data recvd: 89h
data: 41h 49h
Data recvd:
data: 42h
Data recvd: 0h
data: 40h 15h
Data recvd:
data: 41h 47h
Data recvd:
data: 42h
Data recvd: 0h
data: 41h 4ah
Data recvd:
data: 42h
Data recvd: 3fh
data: 41h 4bh
Data recvd:
data: 42h
Data recvd: 89h
data: 41h 49h
Data recvd:
data: 42h
Data recvd: 0h

Fullscreen ti947_reg_value_OK.txt Download

data: 0h
Data recvd: 18h
data: 1h
Data recvd: 0h
data: 2h
Data recvd: 0h
data: 3h
Data recvd: deh
data: 4h
Data recvd: 80h
data: 5h
Data recvd: 0h
data: 6h
Data recvd: 58h
data: 7h
Data recvd: 34h
data: 8h
Data recvd: 34h
data: 9h
Data recvd: 0h
data: ah
Data recvd: 8h
data: bh
Data recvd: 0h
data: ch
Data recvd: 17h
data: dh
Data recvd: 23h
data: eh
Data recvd: 33h
data: fh
Data recvd: 3h
data: 10h
Data recvd: 0h
data: 11h
Data recvd: 0h
data: 12h
Data recvd: 0h
data: 13h
Data recvd: cch
data: 14h
Data recvd: 0h
data: 15h
Data recvd: 1h
data: 16h
Data recvd: 20h
data: 17h
Data recvd: 1eh
data: 18h
Data recvd: 7fh
data: 19h
Data recvd: 7fh
data: 1ah
Data recvd: 1h
data: 1bh
Data recvd: 0h
data: 1ch
Data recvd: 0h
data: 1dh
Data recvd: 0h
data: 1eh
Data recvd: 1h
data: 1fh
Data recvd: 0h
data: 20h
Data recvd: bh
data: 15h
Data recvd: 1h
data: 16h
Data recvd: 20h
data: 17h
Data recvd: 1eh
data: 18h
Data recvd: 7fh
data: 19h
Data recvd: 7fh
data: 1ah
Data recvd: 1h
data: 1bh
Data recvd: 0h
data: 1ch
Data recvd: 0h
data: 1dh
Data recvd: 0h
data: 1eh
Data recvd: 1h
data: 1fh
Data recvd: 0h
data: 20h
Data recvd: bh
data: 21h
Data recvd: 0h
data: 22h
Data recvd: 25h
data: 23h
Data recvd: 0h
data: 24h
Data recvd: 0h
data: 25h
Data recvd: 0h
data: 26h
Data recvd: 0h
data: 27h
Data recvd: 0h
data: 28h
Data recvd: 1h
data: 29h
Data recvd: 20h
data: 2ah
Data recvd: 20h
data: 2bh
Data recvd: b8h
data: 2ch
Data recvd: 0h
data: 2dh
Data recvd: 0h
data: 2eh
Data recvd: a5h
data: 2fh
Data recvd: 5ah
data: 30h
Data recvd: 0h
data: 31h
Data recvd: 0h
data: 32h
Data recvd: 0h
data: 33h
Data recvd: 0h
data: 34h
Data recvd: 0h
data: 35h
Data recvd: 0h
data: 36h
Data recvd: 0h
data: 37h
Data recvd: 0h
data: 38h
Data recvd: 0h
data: 26h
Data recvd: 0h
data: 40h
Data recvd: 10h
data: 41h
Data recvd: 49h
data: 42h
Data recvd: 0h
data: 48h
Data recvd: 0h
data: 49h
Data recvd: 0h
data: 4bh
Data recvd: 0h
data: 4fh
Data recvd: 80h
data: 50h
Data recvd: 16h
data: 54h
Data recvd: 2h
data: 55h
Data recvd: 0h
data: 57h
Data recvd: 2h
data: 3ch
Data recvd: 0h
data: 3dh
Data recvd: 0h
data: 3eh
Data recvd: 0h
data: 3fh
Data recvd: 0h
data: 40h
Data recvd: 10h
data: 41h
Data recvd: 49h
data: 42h
Data recvd: 0h
data: 43h
Data recvd: 0h
data: 44h
Data recvd: 80h
data: 45h
Data recvd: 0h
data: 46h
Data recvd: 63h
data: 47h
Data recvd: 0h
data: 48h
Data recvd: 0h
data: 49h
Data recvd: 0h
data: 4ah
Data recvd: 0h
data: 4bh
Data recvd: 0h
data: 4ch
Data recvd: 0h
data: 4dh
Data recvd: 0h
data: 4eh
Data recvd: 0h
data: 4fh
Data recvd: 80h
data: 50h
Data recvd: 16h
data: 51h
Data recvd: 0h
data: 52h
Data recvd: 0h
data: 53h
Data recvd: 0h
data: 54h
Data recvd: 2h
data: 55h
Data recvd: 0h
data: 56h
Data recvd: 0h
data: 57h
Data recvd: 2h
data: 58h
Data recvd: 0h
data: 59h
Data recvd: 0h
data: 5ah
Data recvd: cdh
data: 5bh
Data recvd: 0h
data: 5ch
Data recvd: 2h
data: 5dh
Data recvd: 6h
data: 5eh
Data recvd: 44h
data: 5fh
Data recvd: 5ah
data: 60h
Data recvd: 22h
data: 61h
Data recvd: 2h
data: 62h
Data recvd: 0h
data: 63h
Data recvd: 0h
data: 64h
Data recvd: 10h
data: 65h
Data recvd: 0h
data: 66h
Data recvd: 0h
data: 67h
Data recvd: 0h
data: 68h
Data recvd: 0h
data: 69h
Data recvd: 0h
data: 6ah
Data recvd: 0h
data: 6bh
Data recvd: 0h
data: 6ch
Data recvd: 0h
data: 6dh
Data recvd: 0h
data: 6eh
Data recvd: 0h
data: 6fh
Data recvd: 0h
data: 70h
Data recvd: 0h
data: 71h
Data recvd: 0h
data: 72h
Data recvd: 0h
data: 73h
Data recvd: 0h
data: 74h
Data recvd: 0h
data: 75h
Data recvd: 0h
data: 76h
Data recvd: 0h
data: 77h
Data recvd: 0h
data: 78h
Data recvd: 0h
data: 79h
Data recvd: 0h
data: 7ah
Data recvd: 0h
data: 7bh
Data recvd: 0h
data: 7ch
Data recvd: 0h
data: 7dh
Data recvd: 0h
data: c2h
Data recvd: 80h
data: c6h
Data recvd: 0h
data: c7h
Data recvd: 60h
data: c8h
Data recvd: c0h
data: 0h
Data recvd: 18h
data: 1h
Data recvd: 0h
data: 2h
Data recvd: 0h
data: 3h
Data recvd: deh
data: 4h
Data recvd: 80h
data: 5h
Data recvd: 0h
data: 6h
Data recvd: 58h
data: 7h
Data recvd: 34h
data: 8h
Data recvd: 34h
data: 9h
Data recvd: 0h
data: ah
Data recvd: 8h
data: bh
Data recvd: 0h
data: ch
Data recvd: 17h
data: dh
Data recvd: 23h
data: eh
Data recvd: 33h
data: fh
Data recvd: 3h
data: 10h
Data recvd: 0h
data: 11h
Data recvd: 0h
data: 12h
Data recvd: 0h
data: 13h
Data recvd: cch
data: 14h
Data recvd: 0h
data: 15h
Data recvd: 1h
data: 16h
Data recvd: 20h
data: 17h
Data recvd: 1eh
data: 18h
Data recvd: 7fh
data: 19h
Data recvd: 7fh
data: 1ah
Data recvd: 1h
data: 1bh
Data recvd: 0h
data: 1ch
Data recvd: 0h
data: 1dh
Data recvd: 0h
data: 1eh
Data recvd: 1h
data: 1fh
Data recvd: 0h
data: 20h
Data recvd: bh
data: 21h
Data recvd: 0h
data: 22h
Data recvd: 25h
data: 23h
Data recvd: 0h
data: 24h
Data recvd: 0h
data: 25h
Data recvd: 0h
data: 26h
Data recvd: 0h
data: 27h
Data recvd: 0h
data: 28h
Data recvd: 1h
data: 29h
Data recvd: 20h
data: 2ah
Data recvd: 20h
data: 2bh
Data recvd: b8h
data: 2ch
Data recvd: 0h
data: 2dh
Data recvd: 0h
data: 2eh
Data recvd: a5h
data: 2fh
Data recvd: 5ah
data: 30h
Data recvd: 0h
data: 31h
Data recvd: 0h
data: 32h
Data recvd: 0h
data: 33h
Data recvd: 0h
data: 34h
Data recvd: 0h
data: 35h
Data recvd: 0h
data: 36h
Data recvd: 0h
data: 37h
Data recvd: 0h
data: 38h
Data recvd: 0h
data: 39h
Data recvd: 0h
data: 3ah
Data recvd: 0h
data: 3bh
Data recvd: 0h
data: 3ch
Data recvd: 0h
data: 3dh
Data recvd: 0h
data: 3eh
Data recvd: 0h
data: 3fh
Data recvd: 0h
data: 40h
Data recvd: 10h
data: 41h
Data recvd: 49h
data: 42h
Data recvd: 0h
data: 43h
Data recvd: 0h
data: 44h
Data recvd: 80h
data: 45h
Data recvd: 0h
data: 46h
Data recvd: 63h
data: 47h
Data recvd: 0h
data: 48h
Data recvd: 0h
data: 49h
Data recvd: 0h
data: 4ah
Data recvd: 0h
data: 4bh
Data recvd: 0h
data: 4ch
Data recvd: 0h
data: 4dh
Data recvd: 0h
data: 4eh
Data recvd: 0h
data: 4fh
Data recvd: 80h
data: 50h
Data recvd: 16h
data: 51h
Data recvd: 0h
data: 52h
Data recvd: 0h
data: 53h
Data recvd: 0h
data: 54h
Data recvd: 2h
data: 55h
Data recvd: 0h
data: 56h
Data recvd: 0h
data: 57h
Data recvd: 2h
data: 58h
Data recvd: 0h
data: 59h
Data recvd: 0h
data: 5ah
Data recvd: cdh
data: 5bh
Data recvd: 0h
data: 5ch
Data recvd: 2h
data: 5dh
Data recvd: 6h
data: 5eh
Data recvd: 44h
data: 5fh
Data recvd: 5ah
data: 60h
Data recvd: 22h
data: 61h
Data recvd: 2h
data: 62h
Data recvd: 0h
data: 63h
Data recvd: 0h
data: 64h
Data recvd: 10h
data: 65h
Data recvd: 0h
data: 66h
Data recvd: 0h
data: 67h
Data recvd: 0h
data: 68h
Data recvd: 0h
data: 69h
Data recvd: 0h
data: 6ah
Data recvd: 0h
data: 6bh
Data recvd: 0h
data: 6ch
Data recvd: 0h
data: 6dh
Data recvd: 0h
data: 6eh
Data recvd: 0h
data: 6fh
Data recvd: 0h
data: 70h
Data recvd: 0h
data: 71h
Data recvd: 0h
data: 72h
Data recvd: 0h
data: 73h
Data recvd: 0h
data: 74h
Data recvd: 0h
data: 75h
Data recvd: 0h
data: 76h
Data recvd: 0h
data: 77h
Data recvd: 0h
data: 78h
Data recvd: 0h
data: 79h
Data recvd: 0h
data: 7ah
Data recvd: 0h
data: 7bh
Data recvd: 0h
data: 7ch
Data recvd: 0h
data: 7dh
Data recvd: 0h
data: 7eh
Data recvd: 0h
data: 7fh
Data recvd: 0h
data: 80h
Data recvd: 0h
data: 81h
Data recvd: 0h
data: 82h
Data recvd: 0h
data: 83h
Data recvd: 0h
data: 84h
Data recvd: 0h
data: 85h
Data recvd: 0h
data: 86h
Data recvd: 0h
data: 87h
Data recvd: 0h
data: 88h
Data recvd: 0h
data: 89h
Data recvd: 0h
data: 8ah
Data recvd: 0h
data: 8bh
Data recvd: 0h
data: 8ch
Data recvd: 0h
data: 8dh
Data recvd: 0h
data: 8eh
Data recvd: 0h
data: 8fh
Data recvd: 0h
data: 90h
Data recvd: 0h
data: 91h
Data recvd: 0h
data: 92h
Data recvd: 0h
data: 93h
Data recvd: 0h
data: 94h
Data recvd: 0h
data: 95h
Data recvd: 0h
data: 96h
Data recvd: 0h
data: 97h
Data recvd: 0h
data: 98h
Data recvd: 0h
data: 99h
Data recvd: 0h
data: 9ah
Data recvd: 0h
data: 9bh
Data recvd: 0h
data: 9ch
Data recvd: 0h
data: 9dh
Data recvd: 0h
data: 9eh
Data recvd: 0h
data: 9fh
Data recvd: 0h
data: a0h
Data recvd: 0h
data: a1h
Data recvd: 0h
data: a2h
Data recvd: 0h
data: a3h
Data recvd: 0h
data: a4h
Data recvd: 0h
data: a5h
Data recvd: 0h
data: a6h
Data recvd: 0h
data: a7h
Data recvd: 0h
data: a8h
Data recvd: 0h
data: a9h
Data recvd: 0h
data: aah
Data recvd: 0h
data: abh
Data recvd: 0h
data: ach
Data recvd: 0h
data: adh
Data recvd: 0h
data: aeh
Data recvd: 0h
data: afh
Data recvd: 0h
data: b0h
Data recvd: 0h
data: b1h
Data recvd: 0h
data: b2h
Data recvd: 0h
data: b3h
Data recvd: 0h
data: b4h
Data recvd: 0h
data: b5h
Data recvd: 0h
data: b6h
Data recvd: 0h
data: b7h
Data recvd: 0h
data: b8h
Data recvd: 0h
data: b9h
Data recvd: 0h
data: bah
Data recvd: 0h
data: bbh
Data recvd: 0h
data: bch
Data recvd: 0h
data: bdh
Data recvd: 0h
data: beh
Data recvd: 0h
data: bfh
Data recvd: 0h
data: c0h
Data recvd: 0h
data: c1h
Data recvd: 0h
data: c2h
Data recvd: 80h
data: c3h
Data recvd: 0h
data: c4h
Data recvd: 78h
data: c5h
Data recvd: 0h
data: c6h
Data recvd: 0h
data: c7h
Data recvd: 0h
data: c8h
Data recvd: c0h
data: c9h
Data recvd: 0h
data: cah
Data recvd: 0h
data: cbh
Data recvd: 0h
data: cch
Data recvd: 0h
data: cdh
Data recvd: 0h
data: ceh
Data recvd: ffh
data: cfh
Data recvd: 0h
data: d0h
Data recvd: 0h
data: d1h
Data recvd: 0h
data: d2h
Data recvd: 0h
data: d3h
Data recvd: 0h
data: d4h
Data recvd: 0h
data: d5h
Data recvd: 0h
data: d6h
Data recvd: 0h
data: d7h
Data recvd: 0h
data: d8h
Data recvd: 0h
data: d9h
Data recvd: 0h
data: dah
Data recvd: 0h
data: dbh
Data recvd: 0h
data: dch
Data recvd: 0h
data: ddh
Data recvd: 0h
data: deh
Data recvd: 0h
data: dfh
Data recvd: 0h
data: e0h
Data recvd: 0h
data: e1h
Data recvd: 0h
data: e2h
Data recvd: 80h
data: e3h
Data recvd: 0h
data: e4h
Data recvd: 68h
data: e5h
Data recvd: 38h
data: e6h
Data recvd: 0h
data: e7h
Data recvd: 0h
data: e8h
Data recvd: 0h
data: e9h
Data recvd: 0h
data: eah
Data recvd: 0h
data: ebh
Data recvd: 0h
data: ech
Data recvd: 0h
data: edh
Data recvd: 0h
data: eeh
Data recvd: 0h
data: efh
Data recvd: 0h
data: f0h
Data recvd: 5fh
data: f1h
Data recvd: 55h
data: f2h
Data recvd: 42h
data: f3h
Data recvd: 39h
data: f4h
Data recvd: 34h
data: f5h
Data recvd: 37h
data: 40h 11h
Data recvd:
data: 41h 47h
Data recvd:
data: 42h
Data recvd: 0h
data: 41h 4ah
Data recvd:
data: 42h
Data recvd: 3fh
data: 41h 4bh
Data recvd:
data: 42h
Data recvd: 89h
data: 41h 49h
Data recvd:
data: 42h
Data recvd: 0h
data: 40h 15h
Data recvd:
data: 41h 47h
Data recvd:
data: 42h
Data recvd: 0h
data: 41h 4ah
Data recvd:
data: 42h
Data recvd: 3fh
data: 41h 4bh
Data recvd:
data: 42h
Data recvd: 89h
data: 41h 49h
Data recvd:
data: 42h
Data recvd: 0h

Fullscreen ti948_reg_value_NG.txt Download

data: 0h
Data recvd: 58h
data: 1h
Data recvd: 4h
data: 2h
Data recvd: 0h
data: 3h
Data recvd: f0h
data: 4h
Data recvd: feh
data: 5h
Data recvd: 1eh
data: 6h
Data recvd: 0h
data: 7h
Data recvd: 18h
data: 8h
Data recvd: 0h
data: 9h
Data recvd: 0h
data: ah
Data recvd: 0h
data: bh
Data recvd: 0h
data: ch
Data recvd: 0h
data: dh
Data recvd: 0h
data: eh
Data recvd: 0h
data: fh
Data recvd: 0h
data: 10h
Data recvd: 0h
data: 11h
Data recvd: 0h
data: 12h
Data recvd: 0h
data: 13h
Data recvd: 0h
data: 14h
Data recvd: 0h
data: 15h
Data recvd: 0h
data: 16h
Data recvd: 0h
data: 17h
Data recvd: 0h
data: 18h
Data recvd: 0h
data: 19h
Data recvd: 1h
data: 1ah
Data recvd: 0h
data: 1bh
Data recvd: 0h
data: 1ch
Data recvd: 13h
data: 1dh
Data recvd: 10h
data: 1eh
Data recvd: 0h
data: 1fh
Data recvd: 0h
data: 20h
Data recvd: 0h
data: 21h
Data recvd: 0h
data: 22h
Data recvd: 40h
data: 23h
Data recvd: 20h
data: 24h
Data recvd: 0h
data: 25h
Data recvd: 0h
data: 26h
Data recvd: 16h
data: 27h
Data recvd: 16h
data: 28h
Data recvd: 11h
data: 29h
Data recvd: 0h
data: 2ah
Data recvd: 0h
data: 2bh
Data recvd: 0h
data: 2ch
Data recvd: 0h
data: 2dh
Data recvd: 0h
data: 2eh
Data recvd: 0h
data: 2fh
Data recvd: 0h
data: 30h
Data recvd: 0h
data: 31h
Data recvd: 0h
data: 32h
Data recvd: 90h
data: 33h
Data recvd: 25h
data: 34h
Data recvd: 1h
data: 35h
Data recvd: 0h
data: 36h
Data recvd: 0h
data: 37h
Data recvd: 8eh
data: 38h
Data recvd: 0h
data: 39h
Data recvd: 0h
data: 3ah
Data recvd: 0h
data: 3bh
Data recvd: 5h
data: 3ch
Data recvd: 20h
data: 3dh
Data recvd: e0h
data: 3eh
Data recvd: 23h
data: 3fh
Data recvd: 0h
data: 40h
Data recvd: 43h
data: 41h
Data recvd: 1fh
data: 42h
Data recvd: 3h
data: 43h
Data recvd: 0h
data: 44h
Data recvd: a1h
data: 45h
Data recvd: 88h
data: 46h
Data recvd: 0h
data: 47h
Data recvd: 0h
data: 48h
Data recvd: fh
data: 49h
Data recvd: 82h
data: 4ah
Data recvd: 0h
data: 4bh
Data recvd: ah
data: 4ch
Data recvd: 0h
data: 4dh
Data recvd: 0h
data: 4eh
Data recvd: 63h
data: 4fh
Data recvd: 0h
data: 50h
Data recvd: 3h
data: 51h
Data recvd: 10h
data: 52h
Data recvd: 0h
data: 53h
Data recvd: 1h
data: 54h
Data recvd: 80h
data: 55h
Data recvd: 0h
data: 56h
Data recvd: 0h
data: 57h
Data recvd: 0h
data: 58h
Data recvd: 0h
data: 59h
Data recvd: 7fh
data: 5ah
Data recvd: 20h
data: 5bh
Data recvd: 20h
data: 5ch
Data recvd: 0h
data: 5dh
Data recvd: 0h
data: 5eh
Data recvd: 0h
data: 5fh
Data recvd: 0h
data: 60h
Data recvd: 0h
data: 61h
Data recvd: 0h
data: 62h
Data recvd: 0h
data: 63h
Data recvd: 0h
data: 64h
Data recvd: 10h
data: 65h
Data recvd: 0h
data: 66h
Data recvd: 0h
data: 67h
Data recvd: 0h
data: 68h
Data recvd: 0h
data: 69h
Data recvd: 0h
data: 6ah
Data recvd: 0h
data: 6bh
Data recvd: 0h
data: 6ch
Data recvd: 0h
data: 6dh
Data recvd: 0h
data: 6eh
Data recvd: 0h
data: 6fh
Data recvd: 0h
data: 70h
Data recvd: 0h
data: 71h
Data recvd: 0h
data: 72h
Data recvd: 0h
data: 73h
Data recvd: 7h
data: 74h
Data recvd: 7h
data: 75h
Data recvd: 8h
data: 76h
Data recvd: 0h
data: 77h
Data recvd: 0h
data: 78h
Data recvd: 0h
data: 79h
Data recvd: 0h
data: 7ah
Data recvd: 0h
data: 7bh
Data recvd: 0h
data: 7ch
Data recvd: 2h
data: 7dh
Data recvd: 0h
data: 7eh
Data recvd: 0h
data: 7fh
Data recvd: 0h
data: 80h
Data recvd: 0h
data: 81h
Data recvd: 0h
data: 82h
Data recvd: 0h
data: 83h
Data recvd: 0h
data: 84h
Data recvd: 0h
data: 85h
Data recvd: 0h
data: 86h
Data recvd: 0h
data: 87h
Data recvd: 0h
data: 88h
Data recvd: 0h
data: 89h
Data recvd: 0h
data: 8ah
Data recvd: 0h
data: 8bh
Data recvd: 0h
data: 8ch
Data recvd: 0h
data: 8dh
Data recvd: 0h
data: 8eh
Data recvd: 0h
data: 8fh
Data recvd: 0h
data: 90h
Data recvd: 0h
data: 91h
Data recvd: 0h
data: 92h
Data recvd: 0h
data: 93h
Data recvd: 0h
data: 94h
Data recvd: 0h
data: 95h
Data recvd: 0h
data: 96h
Data recvd: 0h
data: 97h
Data recvd: 0h
data: 98h
Data recvd: 0h
data: 99h
Data recvd: 0h
data: 9ah
Data recvd: 0h
data: 9bh
Data recvd: 0h
data: 9ch
Data recvd: 0h
data: 9dh
Data recvd: 0h
data: 9eh
Data recvd: 0h
data: 9fh
Data recvd: 0h
data: a0h
Data recvd: 0h
data: a1h
Data recvd: 0h
data: a2h
Data recvd: 84h
data: a3h
Data recvd: 0h
data: a4h
Data recvd: 0h
data: a5h
Data recvd: 0h
data: a6h
Data recvd: 0h
data: a7h
Data recvd: 0h
data: a8h
Data recvd: 0h
data: a9h
Data recvd: 0h
data: aah
Data recvd: 0h
data: abh
Data recvd: 0h
data: ach
Data recvd: 0h
data: adh
Data recvd: 0h
data: aeh
Data recvd: 0h
data: afh
Data recvd: 0h
data: b0h
Data recvd: 0h
data: b1h
Data recvd: 0h
data: b2h
Data recvd: 0h
data: b3h
Data recvd: 0h
data: b4h
Data recvd: 0h
data: b5h
Data recvd: 0h
data: b6h
Data recvd: 0h
data: b7h
Data recvd: 0h
data: b8h
Data recvd: 0h
data: b9h
Data recvd: 0h
data: bah
Data recvd: 0h
data: bbh
Data recvd: 0h
data: bch
Data recvd: 0h
data: bdh
Data recvd: 0h
data: beh
Data recvd: 0h
data: bfh
Data recvd: 0h
data: c0h
Data recvd: 0h
data: c1h
Data recvd: 0h
data: c2h
Data recvd: 0h
data: c3h
Data recvd: 0h
data: c4h
Data recvd: 0h
data: c5h
Data recvd: 0h
data: c6h
Data recvd: 0h
data: c7h
Data recvd: 0h
data: c8h
Data recvd: c0h
data: c9h
Data recvd: 0h
data: cah
Data recvd: 0h
data: cbh
Data recvd: 0h
data: cch
Data recvd: 0h
data: cdh
Data recvd: 0h
data: ceh
Data recvd: 0h
data: cfh
Data recvd: 0h
data: d0h
Data recvd: 0h
data: d1h
Data recvd: 0h
data: d2h
Data recvd: 0h
data: d3h
Data recvd: 0h
data: d4h
Data recvd: 0h
data: d5h
Data recvd: 0h
data: d6h
Data recvd: 0h
data: d7h
Data recvd: 0h
data: d8h
Data recvd: 0h
data: d9h
Data recvd: 0h
data: dah
Data recvd: 0h
data: dbh
Data recvd: 0h
data: dch
Data recvd: 0h
data: ddh
Data recvd: 0h
data: deh
Data recvd: 0h
data: dfh
Data recvd: 0h
data: e0h
Data recvd: 0h
data: e1h
Data recvd: 0h
data: e2h
Data recvd: 0h
data: e3h
Data recvd: 0h
data: e4h
Data recvd: 0h
data: e5h
Data recvd: 0h
data: e6h
Data recvd: 0h
data: e7h
Data recvd: 0h
data: e8h
Data recvd: 0h
data: e9h
Data recvd: 0h
data: eah
Data recvd: 0h
data: ebh
Data recvd: 0h
data: ech
Data recvd: 0h
data: edh
Data recvd: 0h
data: eeh
Data recvd: 0h
data: efh
Data recvd: 0h
data: f0h
Data recvd: 5fh
data: f1h
Data recvd: 55h
data: f2h
Data recvd: 42h
data: f3h
Data recvd: 39h
data: f4h
Data recvd: 34h
data: f5h
Data recvd: 38h

0 William Yi over 3 years ago in reply to Liang Ming

TI__Expert 4160 points

Hi Liang,

Is this happening only to this serializer? Are there any other serializers that this phenomenon occurs with?

Can you try a different length cable? Sometimes longer cables have less reflection and noise.

Additionally could you try the following code? This code has all the erratas implemented.

Fullscreen DS90Ux947-Q1 Init Code Example Rev 1p1.txt Download

"""
  TI Confidential - NDA Restrictions

  Copyright 2020 Texas Instruments Incorporated. All rights reserved.

  IMPORTANT: Your use of this Software is limited to those specific rights
  granted under the terms of a software license agreement between the user who
  downloaded the software, his/her employer (which must be your employer) and
  Texas Instruments Incorporated (the "License"). You may not use this Software
  unless you agree to abide by the terms of the License. The License limits your
  use, and you acknowledge, that the Software may not be modified, copied or
  distributed unless embedded on a Texas Instruments microcontroller which is
  integrated into your product. Other than for the foregoing purpose, you may
  not use, reproduce, copy, prepare derivative works of, modify, distribute,
  perform, display or sell this Software and/or its documentation for any
  purpose.

  YOU FURTHER ACKNOWLEDGE AND AGREE THAT THE SOFTWARE AND DOCUMENTATION ARE
  PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED,
  INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY, TITLE,
  NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL TEXAS
  INSTRUMENTS OR ITS LICENSORS BE LIABLE OR OBLIGATED UNDER CONTRACT,
  NEGLIGENCE, STRICT LIABILITY, CONTRIBUTION, BREACH OF WARRANTY, OR OTHER LEGAL
  EQUITABLE THEORY ANY DIRECT OR INDIRECT DAMAGES OR EXPENSES INCLUDING BUT NOT
  LIMITED TO ANY INCIDENTAL, SPECIAL, INDIRECT, PUNITIVE OR CONSEQUENTIAL
  DAMAGES, LOST PROFITS OR LOST DATA, COST OF PROCUREMENT OF SUBSTITUTE GOODS,
  TECHNOLOGY, SERVICES, OR ANY CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT
  LIMITED TO ANY DEFENSE THEREOF), OR OTHER SIMILAR COSTS.

  Should you have any questions regarding your right to use this Software,
  contact Texas Instruments Incorporated at www.TI.com.

"""
############################
# DS90UB947-Q1 Init Code Example v1.1
# 947->948, Dual FPD-Link STP, 1920x1080@60Hz
############################

import time
import sys

# System dependant variables - adjust according to system 
UB947 = 0x18        # 947 I2C Address
UB948 = 0x68        # Remote 948 Address
StartAmbTemp = 25   # Example temperature measured by local sensor on PCB (Ambient temp around 947). In real system this should be read back from temp sensor during initialization 
Hres = 1920         # Expected horizontal active resolution
Vres = 1080         # Expected vertical active resolution 

def pollstate():
    count=0
    board.WriteI2C(UB947,0x23,0x80)
    board.WriteI2C(UB947,0x24,0x80)
    mask = int('11111',2)
    state = board.ReadI2C(UB947,0x24,1)
    while (state & mask) != 27:   #27 = 5'b11011
        time.sleep(0.01)  #10ms delay
        state = board.ReadI2C(UB947,0x24,1)
        count = count +1
        if count == 10:
            print "Error: Serializer is not in Normal state"
            return(1)
    
    board.WriteI2C(UB947,0x23,0x0)
    board.WriteI2C(UB947,0x24,0x0)

        

def initsequence():

    board.WriteI2C(UB947,0x03,0xDA) # Set I2C passthrough
    
    linked = 0
    retry = 0
    mask = int('10000000',2)
    while linked == 0:
        STS = board.ReadI2C(UB947,0x5A,1)
        if ((STS & mask) != 0):
            linked = 1
            print "Deserializer Detected"
        else:
            time.sleep(0.1)
            retry = retry + 1
            if retry == 10:
                print "Error: No Deserializer Detected"
                return()

    board.WriteI2C(UB948,0x4A,0x01) # Disable OLDI outputs on 948 to prevent screen glitches from appearing during the init process 

    ##### Init A Sequence

    # Errata #5 and 6
    board.WriteI2C(UB947,0x5B,0x03) # Force dual FPD-Link, disable reset on PLL frequency change 

    # Errata #10
    board.WriteI2C(UB947,0x16,0x02) # Adjust BCC watchdog timer to minimum

    # Errata #11
    board.WriteI2C(UB947,0x04,0x90) # Prevent AVMUTE for non-HDCP systems



    state_error = pollstate()  # Poll 947 state machine prior to applying init B errata

    if state_error == 1:
        return()

    ##### Init B Sequence 

    # # Errata #2 (only for older non-eFuse devices)
    # board.WriteI2C(UB947,0x40,0x10)
    # board.WriteI2C(UB947,0x41,0x4A)
    # board.WriteI2C(UB947,0x42,0x3F)
    # board.WriteI2C(UB947,0x41,0x4B)

    # if StartAmbTemp < 10:
    #     board.WriteI2C(UB947,0x42,0x88)
    # else:
    #     board.WriteI2C(UB947,0x42,0x89)
    # board.WriteI2C(UB947,0x41,0x49)
    # board.WriteI2C(UB947,0x42,0x10)
    # board.WriteI2C(UB947,0x42,0x00)
    # board.WriteI2C(UB947,0x40,0x14)
    # board.WriteI2C(UB947,0x41,0x4A)
    # board.WriteI2C(UB947,0x42,0x3F)
    # board.WriteI2C(UB947,0x41,0x4B)
    # if StartAmbTemp < 10:
    #     board.WriteI2C(UB947,0x42,0x88)
    # else:
    #     board.WriteI2C(UB947,0x42,0x89)
    # board.WriteI2C(UB947,0x41,0x49)
    # board.WriteI2C(UB947,0x42,0x10)
    # board.WriteI2C(UB947,0x42,0x00)

    # Errata #3 
    board.WriteI2C(UB947,0x40,0x10)
    board.WriteI2C(UB947,0x41,0x49)
    board.WriteI2C(UB947,0x42,0x16)
    board.WriteI2C(UB947,0x41,0x47)
    board.WriteI2C(UB947,0x42,0x20)
    board.WriteI2C(UB947,0x42,0xA0)
    board.WriteI2C(UB947,0x42,0x20)
    board.WriteI2C(UB947,0x42,0x00)
    board.WriteI2C(UB947,0x41,0x49)
    board.WriteI2C(UB947,0x42,0x00)

    time.sleep(0.01)

    ##### Timing Confirmation 

    retry = 0
    Hconfirm = 0
    Vconfirm = 0
    while (retry < 3):
        board.WriteI2C(UB948,0x68,0x08) # Enable PATGEN BIST
        time.sleep(0.1) # Critical time delay - do not adjust to a shorter value 
        board.WriteI2C(UB948,0x68,0x19) # H active High monitor
        Hhigh = board.ReadI2C(UB948, 0x69, 1)
        board.WriteI2C(UB948,0x68,0x09) # H active Low monitor
        Hlow = board.ReadI2C(UB948, 0x69, 1)
        board.WriteI2C(UB948,0x68,0x39) # V active High monitor
        Vhigh = board.ReadI2C(UB948, 0x69, 1)
        board.WriteI2C(UB948,0x68,0x29) # V active Low monitor
        Vlow = board.ReadI2C(UB948, 0x69, 1)
        board.WriteI2C(UB948,0x68,0x00) # Disable PATGEN BIST

        mask = int('00111111',2)

        hlowmask = Hlow & mask
        hhighmask = Hhigh & mask
        vlowmask = Vlow & mask
        vhighmask = Vhigh & mask


        hhighmask = hhighmask << 6
        vhighmask = vhighmask << 6

        Hactive = hhighmask | hlowmask
        Vactive = vhighmask | vlowmask

        if Hactive != Hres:
            retry  = retry + 1
            board.WriteI2C(UB947,0x40,0x10) # Reset OLDI PLL
            board.WriteI2C(UB947,0x41,0x49)
            board.WriteI2C(UB947,0x42,0x16)
            board.WriteI2C(UB947,0x41,0x47)
            board.WriteI2C(UB947,0x42,0x20)
            board.WriteI2C(UB947,0x42,0xA0)
            board.WriteI2C(UB947,0x42,0x20)
            board.WriteI2C(UB947,0x42,0x00)
            board.WriteI2C(UB947,0x41,0x49)
            board.WriteI2C(UB947,0x42,0x00)
            time.sleep(0.1)
        else:
            Hconfirm = 1
        if Vactive != Vres:
            retry  = retry + 1
            board.WriteI2C(UB947,0x40,0x10) # Reset OLDI PLL
            board.WriteI2C(UB947,0x41,0x49)
            board.WriteI2C(UB947,0x42,0x16)
            board.WriteI2C(UB947,0x41,0x47)
            board.WriteI2C(UB947,0x42,0x20)
            board.WriteI2C(UB947,0x42,0xA0)
            board.WriteI2C(UB947,0x42,0x20)
            board.WriteI2C(UB947,0x42,0x00)
            board.WriteI2C(UB947,0x41,0x49)
            board.WriteI2C(UB947,0x42,0x00)
            time.sleep(0.1)
        else:
            Vconfirm = 1
        if (Hconfirm == 1) and (Vconfirm == 1):
            break

    if (retry > 2):
        print "Error: Timing confirmation failed. Double check expected video resolution and OLDI video input"  
        return()
    else:
        print "Initialization Complete"
        board.WriteI2C(UB948,0x01,0x01) # Digital reset to restart AEQ 
        time.sleep(0.1) # Allow time for 948 to relock 
        board.WriteI2C(UB948,0x4A,0x00) # Enable OLDI outputs on 948

initsequence()

Very Respectfully,

William Y.

0 Liang Ming over 3 years ago in reply to William Yi

Prodigy 30 points

Hello

Yes,only hadppening in serializer, and with about 10pcs. As we don't have a chance to repeat the phenomeno one more time, so no chance to change a long cable.

Compare the int code dfferenc as below.

1. for # Errata #5 and 6, we write (UB947,0x5B,0x00)

2. for # Errata #10,we wirte(UB947,0x16,0x20)

3. Our code without # Errata #11

4. Our code without "Timing Confirmation " Part

From these difference, we need to correct all or we can try some tips step by step?Or some one is mandatory for our application.

0 William Yi over 3 years ago in reply to Liang Ming

TI__Expert 4160 points

Hi Liang,

Yes, I would recommend implementing the entire 947 initialization code that was provided.

As I saw in your schematic, your devices are set in dual mode.

It is important for the devices set in Dual mode to implement the timing confirmation part of the script.

Does the flickering start immediately upon powerup?

Respectfully,

William Y.

0 Liang Ming over 3 years ago in reply to William Yi

Prodigy 30 points

Yes,the flicking only happened during power up immediately, any updated finding about this?

We will updated our coding including timing confirmation and set 0x5B to 0x03 for Forece dual mode.

Thanks!

0 William Yi over 3 years ago in reply to Liang Ming

TI__Expert 4160 points

Hi Liang,

Yes, this issue for flickering is documented for 947 in dual OLDI mode. The Timing confirmation should resolve the flickering occurring that you see. Please reach out to your local FAE in regards to the specifics of this issue

Respectfully,

William Y.

0 Liang Ming over 3 years ago in reply to William Yi

Prodigy 30 points

Hello William

Thank you for your comment , and our local FAE also give us the same solution.

But also still one thing confuse us that we can't repeat the failure phenmeon.

So wether we have some methods to repeat the failure, and we can resolve it with the updated int code.

Or we have some more theoretical explanation this.

Thank You.

0 William Yi over 3 years ago in reply to Liang Ming

TI__Expert 4160 points

Hi Liang,

Please refer to your local FAE, Oliver Tang, in regards to the specifics of this issue. I am already in detailed contact with him with the specifics of this issue. Lets close out this thread here so that we can loop him onto this and to any questions that you may have.

Respectfully,

William Y.

Interface

Interface forum

DS90UB947-Q1: Screen flicker in aftermarket