I purchased EVAL-ADV7610EBZ.I'm trying to confirm the operation to convert HDMI to CVBS.However, HDMI input video cannot be output to CVBS.In EVAL-ADV7610EBZ, conversion may be performed by the following route. PC(Video)-> HDMI-> ADV7610-> ADV7341-> CVBSAs a first step, I tried to display the color bar but it is not also displayed.I referenced to the ADV7340 / ADV7341 data sheet P82.
In this board, CLKIN_A is supplied from the ADV7610, but does not match 27 MHz.So I changed LLC_DLL_PHASE [4:0] register 0x19 of ADV7610, but the clock did not change.
Please advice me in this situation.Is there an example script for HDMI to CVBS conversion using EVAL-ADV7610EBZ?
The conversion by PC-> HDMI-> ADV7610-> ADV7511-> HDMI is converted correctly.
ADI does not have a single chip solution for HDMI -> CVBS conversation. But only Chip that can do is ADV8003.
Is there an example script for HDMI to CVBS conversion using EVAL-ADV7610EBZ?
Yes,example script will be available for HDMI to analog out at 5153.AVES3_EVAL-ADV7611EBZ_20150219.zip, There 56 writes belongs to Encoder(ADV734x). And also for CVBS out, you need to enable one DAC using register 0x82.
Internal Test Pattern Generation:
Below are the registers to control the drive strength of the pixel clock. Try to configure 27Mhz for SD test pattern. Have you check the DR_STR, DR_STR_CLK, and DR_STR_SYNC, LLC_DLL_EN ?Internal test pattern are nothing but on chip test pattern generation using ADV734x.So try to check whether it is possible to apply clock signal on the CLKIN_A pin of the ADV734x
And also refer here https://ez.analog.com/video/w/documents/772/8-bit-656-script-for-adv7611eb1z-adv7611eb2z-adv7612eb1z-adv7612eb2z-adv7619
DR_STR, DR_STR_CLK and DR_STR_SYNC control the drive strengths of the CLK, DATA and SYNC lines. These are used to match traces impedances on the PCB. i.e. control ringing and reflections.
LLC_DLL_EN and LLC_DLL_PHASE control the phase relationship between the CLK line and DATA lines. If used the phase can be tuned to meet board routing differences. It's board dependent.
The 7610 clock output is based on the HDMI input format. The HDMI input must be an SD signal to get 27 MHz output