An improvement on the PAL was the generic array logic device, or GAL, invented by Lattice Semiconductor in 1985. This device has the same logical properties as the PAL but can be erased and reprogrammed. The GAL is very useful in the prototyping stage of a design when any bugs in the logic can be corrected by reprogramming. GALs are programmed and reprogrammed using a PAL programmer, or, in the case of chips that support it, by using the in-circuit programming technique.
An improvement on the PAL was the generic array logic device or GAL invented by Lat,tice Semiconductor in 1985. This device has the same logical properties as the PAL but can be erased and reprogrammed. The GAL is very useful in the prototyping stage of a design when any bugs in the logic can be corrected by reprogramming GALs are programmed and reprogrammed using a PAL programmer, or in the case of chips that support it, by using the in-circuit programming technique.