ADM1024

a FEATURES Up to Nine Measurement Channels Inputs Programmable-to-Measure Analog Voltage, Fan Speed or External Temperature External Temperature Measurement with Remote Diode (Two Channels) On-Chip Temperature Sensor Five Digital Inputs for VID Bits LDCM Support System Management Bus (SMBus) Chassis Intrusion Detect Interrupt and Over Temperature Outputs Programmable RESET Input Pin Shutdown Mode to Minimize Power Consumption Limit Comparison of all Monitored Values System Hardware Monitor with Remote Diode Thermal Sensing ADM1024 APPLICATIONS Network Servers and Personal Computers Microprocessor-Based Office Equipment Test Equipment and Measuring Instruments PRODUCT DESCRIPTION The ADM1024 is a complete system hardware monitor for microprocessor-based systems, providing measurement and limit comparison of various system parameters. Eight measurement inputs are provided, of which three are dedicated to monitoring 5 V and 12 V power supplies and the processor core voltage. The ADM1024 can monitor a fourth power-supply voltage by measuring its own VCC. One input (two pins) is dedicated to a remote temperature-sensing diode. Two further pins can be (continued on page 7 ) FUNCTIONAL BLOCK DIAGRAM VCC VID0/IRQ0 VID1/IRQ1 VID2/IRQ2 VID3/IRQ3 VID0–3 AND FAN DIVISOR REGISTER ADM1024 NTEST OUT/ADD SERIAL BUS INTERFACE SDA SCL 100k⍀ PULLUPS VID4/IRQ4 VID4 AND DEVICE ID REGISTER FAN SPEED COUNTER ADDRESS POINTER REGISTER CHANNEL MODE REGISTER VALUE AND LIMIT REGISTERS FAN1/AIN...