FM3580

The FM3580 is an standard 5-bit VID controller with an integrated a Security controller. FM3580 extends the typical VID feature to a PC motherboard by offering a security function which deters cloning of PC motherboards.

FM3580's Security block generates a new pseudo-random code each time one of its internal registers is read. The PC BIOS is programmed to poll pseudo random code from the FM3580 at frequent intervals. If the appropriate code is not read, the system shuts down, or refuses to boot at power-up. The VID controller portion of FM3580 is identical to FM3560 and is pin compatible with FM3560.

FM3580 is designed using low power CMOS technology.