ADM1034ARQZ-R7 ON Semiconductor, ADM1034ARQZ-R7 Datasheet - Page 30

• Manufacturer Part Number: ADM1034ARQZ-R7
• Description: IC THERM/FAN SPEED CTLR 16-QSOP
• Manufacturer: ON Semiconductor

Specifications of ADM1034ARQZ-R7

• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 125°C, External Sensor
• Output Type: SMBus™
• Output Alarm: Yes
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 32. Register 0x00, # Bytes/Block Read, POR = 0x20, Lock = Y, S/W Reset = Y
Table 33. Register 0x01, Configuration Register 1, Power−On Default 0x01, Lock = Y, S/W Reset = Y
Table 34. Register 0x02, Configuration Register 2, Power−On Default 0x84, Lock = Y, S/W Reset = Y
Table 35. Register 0x03, Configuration Register 3, Power−On Default 0x44, Lock = Y, S/W Reset = Y
<7:0>
<5:4>
<7:4>
<3:0>
Bit
Bit
Bit
Bit
7
6
5
4
3
2
1
0
7
6
3
2
1
0
# Bytes Block Read
Table/SW Con
Lock Bit
SDA Timeout
SCL Timeout
ALERT Configuration
Enable THERM Timer
Averaging Off
Monitor/STBY
Round Robin
Reserved
Channel Selector
4:8 Look−Up Table
Discrete/Linear Speed
Boost Disable
SW Reset
#Poles Fan 2
#Poles Fan 1 1
Name
Name
Name
Name
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Block reads are # bytes/block read long. The maximum is 32 bytes, the SMBus
transaction limit.
Set this bit to 1 to place the fan speed under the control of the look−up table. When this
bit is 0, the ADM1034 is in software/manual control mode. Default = 0.
Set this bit to 1 to prevent the user from writing to the ADM1034 registers.
1 = ADM1034 registers locked. 0 = ADM1034 registers unlocked. Default = 0.
1 = SDA timeout enabled. 0 = SDA timeout disabled. Default = 0.
1 = SCL timeout enabled. 0 = SDL timeout disabled. Default = 0.
0 = SMBusALERT. Default = 0. 1 = ALERT_COMP mode.
1 = timer enabled, 0 = timer disabled. This bit enables THERM as an input. Default = 0.
This bit is used to disable averaging at the slower conversion rates (8 Hz and slower).
Averaging is automatically disabled at the higher (16, 32, and 64 Hz ) conversion rates.
Default = averaging on = 0.
Set bit to 1 to enable temperature monitoring. Set bit to 0 to disable it.
Power−On Default = 1
This bit enables the round−robin mode. Set this bit to 0 to put the ADM1034 in
single−channel mode. The ADC converts on one channel only, which is determined by
the channel selector bits. Default = Round Robin = 1.
Reserved.
This bit determines the channel on which the ADC converts.
00 = Local Channel Only
01 = Remote 1 Channel Only
10 = Remote 2 Channel Only
11 = Reserved
This bit determines how many table points are used to control each fan.
0 = 4 table points for each fan.
1 = all 8 points on one table; this table is used to control both fans.
This bit determines whether the fans run at discrete speeds or at speeds that increase
with temperature between the two thresholds. Default = 1 = Linear.
Set bit to 1 to prevent the fans from being boosted if either THERM temperature or
THERM timer limits are exceeded. Under these conditions, the fan runs at the
previously calculated speed. Default = 0.
Set this bit to 1 to reset the ADM1034 registers to their default values, excluding the limit
registers, offset registers, and look−up table registers. This bit self−clears. Default = 0.
Write the number of poles on Fan 2 to this register. power−on default = 4 poles = 100.
This should always be an even number, because there cannot be an odd number of
poles in a fan.
Write the number of poles in Fan 1 to this register. power−on default = 4 poles = 100.
This should always be an even number, because there cannot be an odd number of
poles in a fan.
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