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Part Number: DLPC3433
We have a custom board with the DLPC3433 and the DLPA2000. Currently we are bringing up the board but it doesn't boot.
We see strange signals on the Data output of the Flash. See the images. The used flash chip is a MX25R1635FZUIH0.
All voltages seem to be okay.
Any idea why this is happening?
Could you please confirm what firmware you are using? Additionally please confirm the DLP3010 DMD is attached, the 1.1V and 1.8V controller rails are coming up, and the PROJ_ON signal is being applied to boot the device.
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In reply to Kyle Rakos:
The DMD is connected.
We are using the following firmware "FWSel_DLPC3433_DLPA2000_pm2_i2c0x36_v7p4p2.img"
The 1.1V and 1.8V rails are coming up. And the PROJ_ON is applied.
In reply to Robin Theunis1:
Are you able to let me know of any discrepancies between your startup waveform and the one shown below:
It is almost the same,
VDDLP12 and VDD are tied together.
And VCC_INTF and VCC_FLSH are 3.3 Volt and always enabled.
I see the 24MHz xtal oscillator working and generating a clean signal.
Thanks for providing the schematic. I have a few comments and questions:
We also see no movement on the low speed interface to the DMD. And we only see that flash interface is doing a FAST READ 0x0B on address 0. And it does keep repeating that command.
Is there something patricular on how the flash should be written? Big endian vs Little endian,... Now it is just a byte for byte copy
So the DLPC3433 seems to only ever try to read a particular byte from the flash and never moves on? Everything you have done seems correct so far. Have you tried with a different flash or different DLPC3433 controller to replicate the problem?
I made some progress, we connected a logic analyzer to the flash and saw that the nibble of each byte were swapped, we fixed that. And now HOST_IRQ goes low, and we have I2C access, but no image. VRST/VOFS and all the other are okay.
When we read out the status registers of the DLPC3433 we get the following, (I used https://www.ti.com/lit/ug/dlpu020c/dlpu020c.pdf as info)
0xD0 --> 0x810xD2 --> 0x01 - 0x00 - 0x00 - 0x080xD4 --> 0x010xD5 --> 0x60 - 0x0d - 0x00 - 0x87
So 0xD2 stells me that something on the DMD side is problematic.
"The system sets the DMD device error for the following conditions:• The system cannot read the DMD device ID from the DMD. • The system-specified DMD device ID does not match the actual DMD device ID."
Then I check 0xD5 and see that the device ID that I read is not the same as mentioned in the document. Which is 60h 0Dh 00h 68h. Because the first byte are correct I don't think it is a communication issue but more a configuration problem? I think that the number in that datasheet is the same as the DLP3010?
We use the following optical engine/projector: https://enhancedworld.com/wp-content/uploads/2019/11/Tech_Spec_40FOV-Light-Engine.pdf
Any idea what could be wrong?
In reply to Robin Theunis2:
I'm confused on a few of your readbacks. Command 0xD0 should just return one status byte. And 0xD2 should just be the embedded software version number (which looks okay). The DMD device ID looks acceptable to me as it is merely an updated device number for our newer version of the DLP3010.
In either case I am glad you are able to communicate with the device. Usually once we can get to this point it means things are ok. Do you not see the LEDs illuminating or the DMD mirrors flipping?
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