GAL output cell
Shows the typical output cell block used for PAL and GAL programmable devices.
This circuit shows the typical output cell block used for PAL and GAL programmable devices. It consists of three main components:
- an n-input OR-gate followed by an XOR-gate,
- a D-type flip-flop,
- a few multiplexers to select the routing of the input signals to the external output (on the right) and the feedback output (on the left).