🚀 go-pugleaf

|>|Its because the display is Multiplexed. The digits are displayed one at a
|>|time to save on chip count (presumably). All of the digits use the same
|>|7 segment decoder chip as opposed to using a seperate chip for every digit.
|>
|>No. To save on pin count.
|
|    In some designs, it isn't just to reduce pin count, but power consumption
|   also.

There are some cases where this would be true (high clock frequency designs,
technolofies with high static power dissipation (ECL)). But with display 
multiplexers and most SSI/MSI ics the pin count has a strong influence on
the co$t.