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TCA9535: Powered-up timing after POR

Part Number: TCA9535

Hi Team,

I have a question about Powered-up timing requirement after POR takes place.
What I want to know here is what is the timing requirement to start I2C communicate with host after POR.


TCA9535 datasheet 8.4.2 Powered-up mentiones "When power has been applied to VCC above VPORR, and the POR has taken place, the device is in a functioning
mode. In this state, the device is ready to accept any incoming I 2C requests and is monitoring for changes on the input ports.".

Question here is what is the timing requirement of "POR has taken place"?
Datasheet figure 39 shows "Power supply recommendations" and VCC_RT is the rise rate of VCC after POR.

Is it ok to see "VCC_RT" is "POR taking time" or there are anything additional wait time to start I2C communication with host?

Regards,
Kai