Using the ADV7393 eval board (EVAL-ADV7392/93EBZ).I have this board connected to an FPGA which is supply the 27MHz clock and data required for SD (NTSC) mode.I have tried all of the SD Timing modes (datasheet pg 80-84) but the output colour is always pink. This is true for either CVBS or component output.
1) I have generated EAV/SAV timing codes and have exactly reproduced the BT.656 standard. The output is pink regardless of pixel input.
2) I have attempted all slave modes with HSYNC/VSYNC. The output is pink.
3) I have attempted all master modes. I imagine since the datasheet says it will generate blanking automatically, this would be the easiest mode to test for a change in output colour. No matter what I do the output is pink.
I have even checked the DAC output waveform and it is always the same signal regardless of what goes into the pixel bus.
I can produce perfect noiseless colour test bars in CVBS or component modes.
What do you think I am missing here?Thanks,
Have you enabled the pixel data valid bit according to corresponding ED/HD/SD Mode? And also refer INPUT CONFIGURATION TABLES FOR PIXEL DATA PIN ASSIGNMENTS.
How do you configure the board either through…
Adding something I forgot to mention, if I read register 0x14 for pixel port readback, the ADV7393 indeed reads back what I am putting into the device.
How do you configure the board either through script or software driver?
-I have been configuring the board through software.
-I have been writing the register value sets like in table 64-68 of the datasheet, while also writing the settings individually in different configurations. Namely I have tried all modes (master and slave) set by R0x8A(<2:0>). The pixel inputs have followed the requirements for these modes when tested.
-I have viewed the I2C communication on an oscilloscope and it is error free-Yes, the pixel input valid bit (R0x82<6>) has been set during my tests.
Time to feel stupid (me that is)! I misread the datasheet and saw that the 7391/0 has its 8-bit SDR input on pins D[7:0], while the 7392/3 has its data input on pins D[15:8]. I made the switch and the device is now functional. Thank you very much.