Programmable Logic Technologies
Fuse and anti-fuse
- fuse makes or breaks link between two wires
- typical connections are 50-300 ohm
- one-time programmable (testing before programming?)
- very high density
EPROM and EEPROM
- high power consumption
- typical connections are 2K-4K ohm
- fairly high density
RAM-based
- memory bit controls a switch that connects/disconnects two wires
- typical connections are .5K-1K ohm
- can be programmed and re-programmed in the circuit
- low density