SN74LV163A: Application notes

Hi Danilo,

The datasheet provides a concise explanation of how this is achieved:

And the following timing diagram shows how those signals work in relation to one another:

Assuming a 2 device daisy-chain (device 1 counts least significant bits, device 2 counts most significant bits), the RCO output of device 1 can be tied to the ENT input for device 2, and the clock input can be shared. Device 2 will only count once when device 1 counts 16 times (from count of 15 to 0, highlighted above), which means each 16 counts will be only a single count for device 2.

In this fashion, many devices can be daisy-chained.