CDCEL9XXPROGEVM: Inability to program CDCE925 Clock Generator IC via CDCEL9XXPROGEVM and TI ClockPro

Jack Eaton

Part Number: CDCEL9XXPROGEVM
Other Parts Discussed in Thread: CDCE925, CLOCKPRO, , CDCEL925

Hello,

I am trying to use the CDCE925 programmable clock generator IC on a board design. Ultimately we would like to be able to program the chip on-board via I2C, but for now I am just trying to get a single chip programmed via the CDCEL9XXPROGEVM programming module. However, I have not yet been able to get the ClockPro software to recognize the CDCE925 via the programming module, which is preventing me from getting a programmed chip.

After reading several threads of similar issues, I currently have the CDCEL9XXPROGEVM connected to an old PC running Windows 7, and by disabling driver signing I show a connection with the module in the device manager.

I have J2 through J5 set accordingly for a CDCE925 (minding the note that the silkscreen is incorrect for J5) and have the chip positioned in the left (top?) side of the socket as instructed. LEDs light up to confirm board power.

As far as I can tell, the board should now come up in the "Programming EVM" window of the ClockPro software when I select the CDCE925/CDCEL925. However, it doesn't recognize anything connected that can be programmed.

I am not sure what I am missing at this point, but one thing I noticed from looking at the schematic of the CDCEL9XXPROGEVM is that Vdd_out/GND appears to be connected to socket pin 22. This does NOT appear to correspond to VDDOUT on the CDCE925 chip; it seems that VDDOUT actually corresponds to socket pin 21. Could this be a potential board mistake? Could I be looking at the incorrect datasheet(s)? At this point, this is the only remaining discrepancy I can find in the relevant documentation.

Upon contacting TI regarding this issue I was told to present my problem to the E2E forums, so I am hoping that this could resolve the issue I am facing.

(By the way, we are having trouble programming the CDCE925 via an external I2C device as well. Even if we can get this issue with the CDCEL9XXPROGEVM taken care of, we'll probably need additional help with the I2C issues as well. But we can get to that later on).

Thanks,

Jack

over 2 years ago

0 vicente flores prado over 2 years ago

TI__Mastermind 22021 points

Hi Jack,
I see that J4 and J5 are both configured incorrectly according to programming user guide.

By chance would you have a CDCE925EVM available? It would be this one: https://www.ti.com/tool/CDCE925PERF-EVM

Regards,

Vicente

0 Jack Eaton over 2 years ago in reply to vicente flores prado

Prodigy 10 points

Hello Vicente,

Regarding J4 -> I am using the CDCE925, not the CDCEL925. It is my understanding that the CDCE925 can support a 3.3V output.

Regarding J5 -> Since the documentation said that the jumper is incorrect "for older board versions" I tried both positions. I did take this photo with the jumper in the 'incorrect' position. That was my mistake, so I apologize there. However I want to note that trying both positions, neither one worked.

Regarding the CDCE925EVM -> Yes, we have one. We are able to use that to program the chip that is soldered onto the board, so I guess technically we have one correctly programmed IC that we just have to desolder from the eval module and solder onto our board. Ultimately I want to reprogram the chip via I2C, and I've been trying to do so via the I2C pins of the CDCE925EVM,but that's also giving us trouble. I will probably post that as a separate issue, as that is the long term implementation and using the CDCEL9XXPROGEVM is an interim step that also happens to not be working.

0 vicente flores prado over 2 years ago in reply to Jack Eaton

TI__Mastermind 22021 points

Hi Jack,

Correction, yes should be 3.3 V for CDCE925.

In regards to programming, there has been many past issues regarding connecting to this device. Try following the instructions in this thread: https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/904979/cdcel9xxprogevm-using-the-clockpro-software?tisearch=e2e-sitesearch&keymatch=CDCEL9XXPROGEVM#

Regards,

Vicente

0 Jack Eaton over 2 years ago in reply to vicente flores prado

Prodigy 10 points

I have reviewed this thread, which instructed the poster to use a Windows 7 PC and disable driver signing. I have already done those things as discussed previously. The EVM Programming module in the ClockPro software will still not recognize the programming module, even though Windows indicates that the drivers are installed and properly working.

0 vicente flores prado over 2 years ago in reply to Jack Eaton

TI__Mastermind 22021 points

Hi Jack,

There is the second E2E thread with different instructions: https://e2e.ti.com/support/clock-timing-group/clock-and-timing/f/clock-timing-forum/933911/cdcel9xxprogevm-cdcel9xxprogevm/3463644?tisearch=e2e-sitesearch&keymatch=CDCEL9XXPROGEVM#3463644 Please let me know if these steps work for you.

Regards,

Vicente

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CDCEL9XXPROGEVM: Inability to program CDCE925 Clock Generator IC via CDCEL9XXPROGEVM and TI ClockPro