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LP5860T: Is it possible to write to multiple LP5860T unit simultaneously over SPI?

Part Number: LP5860T

Tool/software:

I think this should be legal since the datasheet states that: 

During write cycle MISO stays in high-impedance state

I have several LED matrices that are identical but each has a different CSn pin. But if I pull CSn low for two LP5860T devices and write a command out SPI, can I update both devices?

Just for safety I'm putting 100ohm series resistors on each MISO line in case one tries to drive it accidentally.

Thanks,

Derek