Reference Design & Custom Usage of SI5345 Onboard TE0818

[jwil]

Hello, I am in the process of bringing up the 2022.2 Reference Design for the TE0818 SOM +TEBF0818 Carrier. I would like to know more about the default configuration of the SI5345 that is onboard the TE0818 SOM. I have located the associated SkyWorks SI5345 slabtimeproj file in the reference design and have viewed it in ClockBuilderPro.

Is there documentation or a breakdown of how each output port is being used by the SOM under the provided project?

Are there input and output ports specifically left unused for designs to source / consume from off-board? If so, how many, and which ones?

Any other pointers to consider regarding use of the onboard SI5345 are welcome.

Thanks in advance.

[JH]

Hi,
see schematics page 26 (U5 SI5345), page 18 (GTR), page14,15 (GTH):
https://shop.trenz-electronic.de/en/Download/?path=Trenz_Electronic/Modules_and_Module_Carriers/5.2x7.6/TE0818/REV01/Documents

GTR configuration(used interfaces, PCIe, SATA,USB3, DP....) depends on the carrier.
For TEBF0818 carrier, we offer reference designs with basic configuration:
https://wiki.trenz-electronic.de/display/PD/TE0818+StarterKit
br
John

[jwil]

Thank you for the pointers.

One follow-up question on clocks:

If I understand the TEBF0818 / TE0818 reference design correctly, the SI5345 OUT8 differential output is connected to SI5338 IN1/IN2.
Further, the SI5338 CLK1A output is connected to an external SMA connector (J32).

I am trying to program the SI5338 to pass input IN1/IN2 to output CLK1A to verify SI5338 operation.

Is there a default SI5338 configuration included in the reference design?

[jwil]

Following up, after booting the TEBF80818/TE0818, I was able to generate a configuration for the SI5338 and program over I2C to pass an output clock on J32.

[JH]

Good to hear that it works now.
Regarding your question to PLL programming. NVM of SI5338 and also SI5345 are not preprogrammed.
br
John