Anyone cascaded M5450 35 segment led drivers, or liteon LTM-8647 ?

[LinuxHata]

Hello.
Got bunch of these, LiteOn LTM-8647.
These are two-digit, 14 segment LED displays, which have integrated M5450 driver, which is serially driven.
https://www.digikey.com/en/products/detail/liteon/LTM-8647AHR/3199181
I want to use these in some of my projects, but is there a way to cascade them? For some reason, BIT32-34 are external outputs, so maybe they can be used for cascading purposes?

[jbeng]

I've used the mm5451 and it's LCD counterpart (mm5453) and since they have no data output pin, there really is no way cascade them, per se.  The only [reasonably] efficient way I know of to use several of them in a system is to tie the clock lines of all your devices together and send the data to all devices simultaneously, in a serial/parallel fashion.

Here's the device block diagram from the first page of the datasheet, with the datasheet in PDF attached.

[LinuxHata]

Yes there is a way.
Say we have 3 last (or any) outputs unused.
By writing the apropriate byte sequence to them, it is possible to emulate any kind of interface output.
For example, I've used outputs of PCF8575 (I2C expander) to drive APA102C leds (SPI interface).
I just asked, whenever anyone done that with these ancient chips.

[Uunoctium]

It's not the same, but Philips realized a mux of 4 LTM8328 (4 digit version LiTeon) in PM5193 50MHz Function Generator

p. 102 in Pdf
https://www.opweb.de/deutsch/firma/Philips/PM5193