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FM3580 - 5-Bit VID Controller

General Description

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.

Key Features

  • I VID controller similar to FM3560 I Integrated “anti-clone” Security controller I Configurable Output type.
  • TTL.
  • Open-Drain I Pin compatible to FM3560 I SMBus interface to Security/VID controls I Operating VCC : 2.7V to 5.5V I Operating Temp: 0°C to +70°C I Package: 20-Pin TSSOP Block Diagram Security Encoder SCL SDA ASEL WP SMbus Interface & Control Control Logic EEPROM & Register Array Level Mux_Sel /Override I[4:0] Muliplexer & Output Logic Non_Mux_Out Y[4:0] © 20.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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FM3580 5-Bit VID Controller Integrated with Serial Interface PC Security Element January 2002 FM3580 5-Bit VID Controller with PC Security Element General Description 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.