Part Number:66AK2L06
Hi all,
I am using the 66aK2L06 for my project. I set the K26/CSISC2_3 to "0" through the external resistor, means CSIS2_3 is assigned to sgmii lane 2 and 3 when powerup. I am using lane 2 for sgmii serdes, lane 3 is unused, and therefore, all the pins for lane 3 are left floating (unconnected) included the "shared_serdes_2_refres". But I saw the error below in u-boot,
"common init: check pll status failed -110
provider lanes enable: failed -110"
The error is disappeared once I connect the shared_serdes_2_refres pin to ground through a 3k resistor. The shared_serdes_2_refres pin is for lane 3 which I m not using it, is it a must to connect the shared_serdes_2_refres pin to ground through a 3k ohm resistor?
What is SGMII SerDes reference resistor input (3 kΩ ±1%)? what is it used for?
Thanks.