ADM9240 View Datasheet(PDF) - ON Semiconductor
Part Name
Description
Manufacturer
ADM9240 Datasheet PDF : 22 Pages
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a
Low Cost Microprocessor
System Hardware Monitor
ADM9240
FEATURES
Six Direct Voltage Measurement Inputs (IncludingTwo
Processor Core Voltages) with On-Chip Attenuators
On-Chip Temperature Sensor
Five Digital Inputs for VID Bits
Fully Supports Intel’s LANDesk Client Manager (LDCM)
Register-Compatible with LM7x Products
Two Fan Speed Monitoring Inputs
I2C® Compatible System Management Bus (SMBus)
Chassis Intrusion Detect
Interrupt Output
Programmable RESET I/O Pin
Shutdown Mode to Minimize Power Consumption
Limit Comparison of all Monitored Values
APPLICATIONS
Network Servers and Personal Computers
Microprocessor-Based Office Equipment
Test Equipment and Measuring Instruments
PRODUCT DESCRIPTION
The ADM9240 is a complete system hardware monitor for
microprocessor-based systems, providing measurement and
limit comparison of up to four power supplies and two proces-
sor core voltages, plus temperature, two fan speeds and chassis
intrusion. Measured values can be read out via an I2C-compat-
ible serial System Management Bus, and values for limit com-
parisons can be programmed in over the same serial bus. The
high speed successive approximation ADC allows frequent
sampling of all analog channels to ensure a fast interrupt
response to any out-of-limit measurement.
The ADM9240’s 2.85 V to 5.75 V supply voltage range, low
supply current and I2C compatible interface, make it ideal for a
wide range of applications. These include hardware monitoring
and protection applications in personal computers, electronic
test equipment and office electronics.
FUNCTIONAL BLOCK DIAGRAM
VCC
VID0
VID1
VID2
VID3
VID4
FAN1
FAN2
+VCCP1
+2.5VIN
+3.3VIN
+5VIN
+12VIN
+VCCP2
BANDGAP
TEMPERATURE
SENSOR
VID0 - 3 AND
FAN DIVISOR
REGISTERS
SERIAL BUS
ADDRESS
REGISTER
VID4 AND
DEVICE ID
REGISTER
FAN SPEED
COUNTER
INPUT
ATTENUATORS
AND
ANALOG
MULTIPLEXER
ADDRESS
POINTER
REGISTER
TEMPERATURE
CONFIGURATION
REGISTER
9-BIT ADC
ADM9240
SERIAL BUS
INTERFACE
VALUE AND LIMIT
REGISTERS
LIMIT
COMPARATORS
INTERRUPT
STATUS
REGISTERS
INT MASK
REGISTERS
CONFIGURATION
REGISTER
ANALOG
OUTPUT REGISTER
AND 8-BIT DAC
CHASSIS
INTRUSION
CLEAR REGISTER
NTEST_OUT/A0
A1
SDA
SCL
CI
INT
NTEST_IN/AOUT
RESET
GNDA
GNDD
I2C is a registered trademark of Philips Corporation.
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