ADT7463ARQZ ON Semiconductor, ADT7463ARQZ Datasheet - Page 50

• Manufacturer Part Number: ADT7463ARQZ
• Description: IC REMOTE THERMAL CTRLR 24-QSOP
• Manufacturer: ON Semiconductor
• Series: dBCool®r

Specifications of ADT7463ARQZ

• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, Fan Speed Counter, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 120°C, External Sensor
• Output Type: SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 120°C
• Mounting Type: Surface Mount
• Package / Case: 24-QSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADT7463
Bit
<1:0>
<3:2>
<5:4>
<7:6>
Bit
<0>
<1>
<3:2>
<7:4>
*This register becomes read-only when the Configuration Register 1 Lock bit is set to 1. Any further attempts to write to this register will have no effect.
Bit
<7:0>
Bit
<7:0>
Name
FAN1
FAN2
FAN3
FAN4
Name
AL2.5V
TH5V
AINL
RES
Name
Reserved
Name
Reserved
Table XXXIX. Register 0x7B – Fan Pulses per Revolution Register (Power-On Default = 0x55)
Table XLII. Register 0x7F – Manufacturer’s Test Register 2 (Power-On Default = 0x00)
Table XLI. Register 0x7E – Manufacturer’s Test Register 1 (Power-On Default = 0x00)
Table XL. Register 0x7D – Configuration Register 4 (Power-On Default = 0x00)
R/W
Read/Write
Read/Write
Read/Write
Read/Write
R/W
Read/Write
Read/Write
Read/Write
Read/Write
Read-Only
Read/Write
Read-Only
Description
Sets number of pulses to be counted when measuring FAN 1 speed. Can be used to
determine fan’s pulses per revolution for unknown fan type.
Pulses Counted
Sets number of pulses to be counted when measuring FAN 2 speed. Can be used to
determine fan’s pulses per revolution for unknown fan type.
Pulses Counted
Sets number of pulses to be counted when measuring FAN 3 speed. Can be used to
determine fan’s pulses per revolution for unknown fan type.
Pulses Counted
Sets number of pulses to be counted when measuring FAN 4 speed. Can be used to
determine fan’s pulses per revolution for unknown fan type.
Pulses Counted
Description
AL2.5V = 1, Pin 22 (2.5V/SMBALERT) is configured as an SMBALERT interrupt
output to indicate out-of-limit error conditions. AL2.5V = 0, Pin 22 (2.5V/SMBALERT)
is configured as a 2.5 V measurement input.
TH5V = 1, Pin 20 (5V/THERM) is configured as THERM pin. For THERM
Monitoring, Bit 1 (THERM Timer) of Configuration Register 3 must also be set.
TH5V = 0, Pin 20 (5V/THERM) is configured as 5 V measurement input.
These two bits define the input threshold for 2-wire fan speed measurements:
Unused.
Description
Manufacturer’s Test Register. These bits are reserved for manufacturer’s test
purposes and should NOT be written to under normal operation.
Description
Manufacturer’s Test Register. These bits are reserved for manufacturer’s test
purposes and should NOT be written to under normal operation.
00 = 1
01 = 2 (Default)
10 = 3
11 = 4
00 = 1
01 = 2 (Default)
10 = 3
11 = 4
00 = 1
01 = 2 (Default)
10 = 3
11 = 4
00 = 1
01 = 2 (Default)
10 = 3
11 = 4
00 = �20 mV
01 = �40 mV
10 = �80 mV
11 = �130 mV
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