What are ASICs?
ASIC is an acronym that stands for Application Specific Integrated Circuit, which means basically a circuit board designed to do something very specific. It's the problem of solving the blockchain, where your computer or circuit board computer finds something in a bunch of numbers and gets rewarded.
Programmable chip:
That is, you can write programs to obtain corresponding currency rewards according to the currency you want to mine.
The ASIC chip has a fixed algorithm and cannot be changed. If the computing power of a currency algorithm is eliminated, it can only be reproduced. It is impossible to change the algorithm on the original chip to increase the computing power. However, programmable chips are possible, not only To improve the computing power, you can also rewrite the algorithms of other currencies, so the programmable chip can mine many kinds of currencies.