Hi Them,
I would like to know the wait time before the I2C responds after PDB toggle.
I understand that “During initial power-up, a delay of 10 ms is required before the I2C responds”.
So, I guess that wait time is 10ms.
Is my understanding correct?
If no, could you please let us know this wait time?
Regards,
Hide
Hello Hide,
Yes, you should wait at least 10 ms after PDB goes HIGH before attempting I2C communication with the SER/DES devices.
But to elaborate, after PDB goes HIGH, there will be some wait time until the SER/DES devices LOCK onto each other and allow proper communication between the connected devices. You should wait until after the devices LOCK onto each other, before attempting I2C communication.
The max possible LOCK times are defined as "t_PLD" and "t_DDLT" in the DS92LV042x datasheet. Figures 7 and 8 also describe the LOCK time in the SER/DES devices.
Depending on your setup, you may need to wait a bit longer. See the Switching Characteristics table in the datasheet for more details.
Best,
Justin Phan
