SN65DSI83: Black screen after initializing

Roy Chou1

Part Number: SN65DSI83

Hi Team,

Now we are using SN65DSI83 to do the transformation from DSI to LVDS. We find black screen issue after initializing. Before initializing the register, we clear the 0xE5 and after initializing, it's possible to read 0xE5=0x81. It looks like the issue relating to STNC.

Can you let me know which factor may cause the ERR? Do we have another method to check if chip is ok or not?

Ps.(Register data is ok when black screen issue. Screen can be recovered when we disable/enable and re-write the reg via I2C)

0x09=0x00

0x0A=0x05

0x0B=0x10

0x10=0x26

0x12=0x26

0x18=0x78

0x20=0x00

0x21=0x05

0x24=0xD0

0x25=0x02

0x28=0x20

0x2C=0x0C

0x2D=0x00

0x30=0x0C

0x31=0x00

0x34=0x28

0x36=0x30

0x38=0x08

0x3A=0x0C

0x0D=0x01

0x09=0x01

Regards,

Roy

over 3 years ago

0 David (ASIC) Liu over 3 years ago

TI__Guru**** 181921 points

Roy

Have they followed initialization sequence in Table 7-2?

Thanks

David

0 Roy Chou1 over 3 years ago in reply to David (ASIC) Liu

TI__Genius 16780 points

Hi David,

We checked the setup. It's possible that we didn't meet seq.8

If we place seq8 before seq.5, is it possible to occur error? Can you read corresponding fault in CSR(0xE5)?

Regards,

Roy

0 David (ASIC) Liu over 3 years ago in reply to Roy Chou1

TI__Guru**** 181921 points

Roy

Since the DSI83 registers have not been programmed when the DSI source starts to send the data, the video timing contained in the DSI data will not match with the timing data in the registers and this will cause error.

Thanks

David

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SN65DSI83: Black screen after initializing