ADT7490 Datasheet, PDF (2/76 Pages) Analog Devices – dBCool Remote Thermal Monitor and Fan Controller with PECI Interface

ADT7490
GPIO1
GPIO2
THERM/
SMBALERT
TACH1
TACH2
TACH3
TACH4
PWM1
PWM2
PWM3
PECI
V_TT
V_CC
V_CCP
+12V_IN
+5V_IN
+2.5V_IN
I_MON
D1+
D1–
D2+
D2–
FUNCTIONAL BLOCK DIAGRAM
ADDR SELECT
SCL SDA
GPIO REGISTER
SMBus
ADDRESS
SELECTION
SERIAL BUS
INTERFACE
ADT7490
PWM
REGISTERS
AND
CONTROLLERS
(HF AND LF)
PERFORMANCE
MONITORING
THERMAL
PROTECTION
FAN
SPEED
COUNTER
ACOUSTIC
ENHANCEMENT
PECI INTERFACE
AUTOMATIC
FAN SPEED
CONTROL
DYNAMIC T_MIN
CONTROL
ADDRESS
POINTER
REGISTER
PWM
CONFIGURATION
REGISTERS
INTERRUPT
MASKING
INPUT
SIGNAL
CONDITIONING
AND
ANALOG
MULTIPLEXER
ACOUSTIC
ENHANCEMENT
CONTROL
10-BIT
ADC
BAND GAP
REFERENCE
INTERRUPT
STATUS
REGISTERS
LIMIT
COMPARATORS
VALUE AND
LIMIT
REGISTERS
BAND GAP
TEMP. SENSOR
GND
Figure 1.
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