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FM3570 Datasheet Cpu Configuration Controller

Manufacturer: Fairchild (now onsemi)

Overview: FM3570 CPU CONFIGURATION CONTROLLER Register/Multiplexer for Microprocessor VID Preliminary March 2001 FM3570 CPU CONFIGURATION CONTROLLER Register/Multiplexer for Microprocessor.

General Description

The Fairchild FM3570 replaces the CPU motherboard’s configuration switches with an electronic implementation consisting of a 4/5-bit multiplexed, 1-bit latched port, standard 2-wire bus interface, and non-volatile latches.

The FM3570 multiplexes the I-port input signals with two internal non-volatile registers that can be loaded through the serial port.

The multiplexer is selected via the serial port and defaults to the I-port upon power-up.

Key Features

  • I Extended Operating Voltage Range 3.0V-5.5V I IIC Compatible Slave Interface. I ESD performance: Human body model > 2000V I Choice of 2.5V Outputs or Open-Drain Outputs Block Diagram Non_Mux_Out I[4:0] Y[4:0] Mux1 SOPRA Mux2 SOPRB MXSB, MXSA IIC Read Logic Mux3 Control Logic MUXSEL OVRD SDA SCL IIC Interface Shift Register Slave Address Register ASEL Comparator Start/Stop Logic © 2001 Fairchild Semiconductor Corporation FM3570 Rev. A 1 www. fairchildsemi. com FM3570 CPU.

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