Apparently the LED module refers to the need for the user to
use Shadow Registers, but datasheet does not convey the module
takes care of this for the user. Eg,. user does not have to place
a separate Shadow Register module to use the LED Module.
The datasheet says "The LED User Module is a convenient way to turn a pin on and off without having to think about shadow
I guess that statement hints that the UM takes care of the Shadow Registers, but it does not say anything more.
We will take a look into this and make it clearer.