topic RAM for Ethernet controllers in P-Series

RAM for Ethernet controllers

thElibrarian — Sun, 30 Nov 2025 22:00:06 GMT

Hello, Im just looking for the information how many RAM an eTSEC Ethernet controller on the SOC has on it's disposal? I cannot find this detail.

Thank you

BR /Chris

Re: RAM for Ethernet controllers

thElibrarian — Mon, 01 Dec 2025 14:38:23 GMT

I found this document about the eTSEC controller: Use the Enhanced Triple-Speed Ethernet Controller (eTSEC) Is the information Im looking for on page 18, or refer this TX/RX cache more to a buffer within the driver or TCP/IP stack?

Thanks in advance

/Chris

Re: RAM for Ethernet controllers

June_Lu — Tue, 02 Dec 2025 04:08:43 GMT

Would you kindly let me know your MPU part number and SW version?

Thanks.

Re: RAM for Ethernet controllers

thElibrarian — Tue, 09 Dec 2025 11:50:11 GMT

Hi, I don't know where to obtain these exact numbers. I know it's a MPC8540 PowerQUICCIII with an e500 core. Another question is also, if there is a memory between the Ethernet controller and the MPU where Ethernet frames were hand over to the TCP/IP stack. Which should be significant larger? Or does this happen already in the usual RAM?

Thanks a lot

/Chris

Re: RAM for Ethernet controllers

June_Lu — Fri, 12 Dec 2025 03:37:14 GMT

I am sorry, I don't know why I could not receive your reply.

MPC8540 is discontinued, the question related to it is not supported.

Generally, the MPU will have an external RAM to run the program.

If it's MPC8540, there may be external DDR.

Thanks