Other Parts Discussed in Thread: DP83848C
I'm using DP83822IF Ethernet phy with STM32F207 micro controller based on the TI recommendation for fiber optic Ethernet communication.
I found some strange behavior while using the DP83822IF. The Ethernet communication is working fine for sometime, but suddenly it stop working (sometime with in 10min and some time after 2hours). All remaining operation of the micro controller is just fine, but Ethernet communication alone stop working. Even after restart the power supply, the communication will not work. But when I plug the ICSP programming header of the microcontroller, the Ethernet communication will resume. Sometime we need to reprogram the microcontroller to get the Ethernet communication.
I'm using St-Link/V2-ISOL isolated programmer so the there is no earthing related issue. After this issue I changed my PHY from DP83822IF to DP83848C in the same design. I'm testing the new IC with multiple PCB's for last one week, there is no problem and not even a single disconnection issue. Unfortunately I need to go for fiber optic communication again due to my requirement. So please give us a solution to resolve this problem