DP83867CR: how to change the TX Clock Skew and RX Clock Skew

Betty Guo

Part Number: DP83867CR

Hi team,

my customer has a question about DP83867. He want to change the TX skew and RX skew, like below show.

So how to change TX skew and RX skew? does it need any hardware changes? or just change registers? if only change registers, which register should be change? there are many register shown on datasheet.

thank you.

over 7 years ago

0 Ross Pimentel over 7 years ago

TI__Mastermind 23675 points

Hi Betty,

You can either use hardware bootstraps found in the bootstrap section or register access using register 0x86.

0 Betty Guo over 7 years ago in reply to Ross Pimentel

TI__Expert 7300 points

Hi Ross,

My understanding is for hardware, set LED_2 and LED_1 (RGZ) for RGMII Clock Skew TX[] change and set GPIO_0 and GPIO_1 for RGMII Clock
Skew RX[] change, right?

use Rhi and Rlo to decide the mode and then change the clock skew.

thank you

0 Ross Pimentel over 7 years ago in reply to Betty Guo

TI__Mastermind 23675 points

Hi Betty,

Your understanding is correct.

Interface

Interface forum

DP83867CR: how to change the TX Clock Skew and RX Clock Skew