Part Number: DP83869HM
Tool/software:
Following the instructions in the Reference Manual Section 7.3.5 BIST Configuration to place the part in digital loopback mode and then checking the link status register (0x1) we are not seeing the Link Up like the manual suggests it should be.
Performing the following,
1. Write 0xe720 to register 0x00fe
2. Write 0x0140 to register 0x0
3. Write 0x5028 to register 0x10
4. Write 0x4 to register 0x16
5. Read register 0x1 -> Get back 0x7949 indicating the link is down
The reference manual states "the PHY link status will go high, regardless if there is a cable connected or not".
Any suggestions on how to further debug this? The device is boot-strapped to be in RGMII-to-SGMII mode and the steps above were performed after a initial hardware reset of the PHY.
