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DS90UB913A-Q1: PCLK is needed when only I2C communication is needed between SER-DES?

Part Number: DS90UB913A-Q1

Hello team,

Please tell me about the UB913 settings when connecting to UB954-UB913.

UB913 / UB933 is connected to UB954, I2C master is connected to UB913 / UB933 side, and it is connected to UB954 side.
We are considering a jig to rewrite the flash memory connected to the I2C slave.

Since it is only an I2C connection, no video-related signals are input to the following terminals of UB913 / UB933, and it is used in OPEN.
DIN [11: 0], HS, VS

I have a question here.
Is it okay if the PCLK terminal is also OPEN? Or should I put in some kind of clock?

Regards,

Hirata