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DS90UB925Q-Q1: DS90UB925 - DS90UB926 low frequency mode setting via register

Part Number: DS90UB925Q-Q1

Hello,

We are transmitting a video from a 925 ser to a 926 deser, this must happen in LF_MODE, but we cannot change the bootstrap setting, the LF_MODE setting must be programmed via the i2c interface.

In normal mode with the serailizer setting

addr  0x18 reg 0x4 val  0x80

and the deserilizer setting

addr  0x58 reg 0x2 val  0x00

everything works as expected

but when the LF_MODE is forced by doing

addr  0x18 reg 0x4 val  0x83

on the serializer

and

addr  0x58 reg 0x2 val  0x02

on the deserilizer, the lock is lost forever.

On the datasheet i read that a LF_MODE change must be follower by a PDB strobe, but that will clear all the register settings... how do we program the LF_MODE with the register interface?

Thanks,

Marco