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ADM9240 Datasheet

  • ADM9240

  • Low Cost Microprocessor System Hardware Monitor

  • 588.83KB

  • 23頁(yè)

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a
FEATURES
Six Direct Voltage Measurement Inputs (Including Two
Processor Core Voltages) with On-Chip Attenuators
On-Chip Temperature Sensor
Five Digital Inputs for VID Bits
Fully Supports Intel鈥檚 LANDesk Client Manager (LDCM)
Register-Compatible with LM7x Products
Two Fan Speed Monitoring Inputs
I
2
C
廬
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
Low Cost Microprocessor
System Hardware Monitor
ADM9240
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 I
2
C-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鈥檚 2.85 V to 5.75 V supply voltage range, low
supply current and I
2
C 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
V
CC
VID0
VID1
VID2
VID3
VID4 AND
DEVICE ID
REGISTER
VID0 - 3 AND
FAN DIVISOR
REGISTERS
SERIAL BUS
ADDRESS
REGISTER
SERIAL BUS
INTERFACE
NTEST_OUT/A0
A1
SDA
SCL
VALUE AND LIMIT
REGISTERS
LIMIT
COMPARATORS
CI
INTERRUPT
STATUS
REGISTERS
INT
MASK
REGISTERS
INT
CONFIGURATION
REGISTER
VID4
FAN1
FAN2
FAN SPEED
COUNTER
ADDRESS
POINTER
REGISTER
TEMPERATURE
CONFIGURATION
REGISTER
+V
CCP1
+2.5V
IN
+3.3V
IN
+5V
IN
+12V
IN
+V
CCP2
BANDGAP
TEMPERATURE
SENSOR
INPUT
ATTENUATORS
AND
ANALOG
MULTIPLEXER
9-BIT ADC
ANALOG
OUTPUT REGISTER
AND 8-BIT DAC
NTEST_IN/AOUT
RESET
ADM9240
CHASSIS
INTRUSION
CLEAR REGISTER
GNDA
GNDD
I
2
C is a registered trademark of Philips Corporation.
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
漏 Analog Devices, Inc., 1998

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