There isn't really code in an ASIC (there can be, but the more there is, the less of an ASIC it is), it's a physical configuration of transistors to accomplish

There isn't really code in an ASIC (there can be, but the more there is, the less of an ASIC it is), it's a physical configuration of transistors to accomplish a specific task. Can you change the code in a drill to make it a hammer? Not really, you can maybe screw a metal bit to the back so you can use it to bash in some nails, but it's probably cheaper to buy a new tool/ASIC.