AM5K2E02: SerDes interface

Rogerio Almeida

Part Number: AM5K2E02

From customer:

I’m working on a project using the AM5K2E02 processor.

I’m currently looking at the SerDes interface for a few peripherals. I have a couple of questions regarding the example code given in the SDK:

The example code inserts values into a large number of registers which the guide (SPRUHO3A) marks as reserved. Some of these values differ depending on the peripheral being configured. For the purpose of certification/qualification, are you able to provide a breakdown of these reserved registers and their purpose?
In the example for SerDes configuration of the PCIe peripheral, the code sets configures the peripheral as a 4-lane PHY-A; whereas the guide (SPRUHO3A) describes the PCIe peripheral as using a 2-line PHY-A. Are the Lane 2/3 register values necessary, or can they be ignored?

The SDK file I have been looking at is located at: pdk_k2e_4_0_9/packages/ti/csl/src/ip/serdes_sb/V0/csl_wiz8_sb_refclk100MHz_pci_5Gbps.c

over 7 years ago

0 Cvetolin Shulev-XID over 7 years ago

TI__Guru 65405 points

The team is notified. They will post their feedback directly here.

BR
Tsvetolin Shulev

0 lding over 7 years ago in reply to Cvetolin Shulev-XID

TI__Guru* 95265 points

Rogerio,

For the Keystone II device, we only publish those registers info allowed by Serdes vendor. I may have some older Serdes user guide with additional registers explained, but I don't think it has all the reserved register info available. And I think that can't be given to customer, may be a NDA is required.

For the PCIE interface, it is PHY-A 2-lane. The function you referring to csl_wiz8_sb_refclk100MHz_pci_5Gbps.c, has configuration of 4-lanes, I need to check with Serdes people for the purpose.

Regards, Eric

0 lding over 7 years ago in reply to lding

TI__Guru* 95265 points

Rogerio,

Those files are from Serdes vendor. There are PHYs with 1, 2, 4 lanes, programming 4 lanes when you have 1, 2 or 4 does not create any issues.

Regards, Eric

0 Rogerio Almeida over 7 years ago in reply to lding

TI__Mastermind 26245 points

Eric,
thanks a lot. Since field knows this link, if they want more details, I will let them jump in here.

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AM5K2E02: SerDes interface