Activity
From 09/11/2021 to 10/10/2021
09/30/2021
- Hey all,
I've got another weird problem coming up.
For a few days now, especially when the board is in operation for a longer period of time, I have noticed that the data transfer from the FPGA DDR, with a DMA instantiated in the FPG...
09/23/2021
- AB 03:52 PM PCB Development: RE: Ethernet PHY
- Lucas,
Thanks for the followup.
It actually looks like at Gigabit speeds the *KSZ9031* only specifies ~221mA for the 1.2V supply while the *KSZ9021* is 563mA.
When operating in 100Mbit mode the KSZ9021 only draws 158mA which wou... - LU 03:25 PM PCB Development: RE: Ethernet PHY
- Problem solved. Hopefully for real this time.
The KSZ9021RN takes about 500mA when running in 1000Mb/s mode. The current rating for the 1.2v LDO is 500mA.
Things seem to function fine with a bench supply running the 1.2v bus with c...
09/21/2021
- LU 11:16 PM PCB Development: RE: Ethernet PHY
- I'm having trouble on the new version of the board, which is super frustrating as a few bodges got the previous version working. The symptoms are the ethernet section resets itself every other second or so, pulling down the 1.2 rail ever...
09/15/2021
- DV 11:58 PM PCB Development: RE: USB Hub
- Hi Lucas,
Glad to hear you were able to get the USB hub working, thank you for the update!
Dan - LU 06:05 PM PCB Development: RE: USB Hub
- I've built a few prototypes of the next board iteration and the USB is now working.
This time I used TI's TUSB2036 reference design (https://www.ti.com/lit/ug/sllu190/sllu190.pdf). The difference was the voltage dividers to the TPS204...