ADM1034ARQZ-R7 ON Semiconductor, ADM1034ARQZ-R7 Datasheet - Page 19

• 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

Interrupt Masking Register
0x09, and 0x0A. These allow individual interrupt sources to
be masked out to prevent the SMBusALERT interrupts.
Masking
SMBusALERT from being asserted; the appropriate status bit
is still set as normal.
Table 16. Mask Register 1 (Reg. 0x08)
Table 17. Mask Register 2 (Reg. 0x09)
Mask Registers 1, 2, and 3 are located at Addresses 0x08,
Bit #
Bit #
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
5. Take the appropriate action for a given interrupt
6. Exit the interrupt handler.
7. Periodically poll the status register. If the interrupt
source.
status bit clears, reset the corresponding interrupt
mask bit to 0. The SMBusALERT output and
status bits then behave as shown in Figure 31.
Name
Name
the
R1H
R1D
R2H
R2D
R1L
R2L
Res
Res
Res
Res
Res
T%
LH
TS
LL
TA
interrupt
1 masks the ALERT for the local high
temperature.
1 masks the ALERT for the local low
temperature.
1 masks the ALERT for the Remote 1
high temperature.
1 masks the ALERT for the Remote 1 low
temperature.
1 masks the ALERT for the Remote 1
diode errors.
1 masks the ALERT for the Remote 2
high temperature.
1 masks the ALERT for the Remote 2 low
temperature.
1 masks the ALERT for the Remote 2
diode errors.
Reserved.
Reserved.
Reserved.
1 masks the ALERT for the THERM %
on−time limit.
1 masks the ALERT for the THERM limit
being exceeded and the THERM output
signal being asserted.
1 masks the ALERT for the THERM state;
has no effect on ALERT in ALERT comp
mode.
Reserved.
Reserved.
source
Description
Description
prevents
only
http://onsemi.com
the
19
FAN_FAULT Output
fans stall. Pin 8, the FAN_FAULT output, is a dual−function
pin. It defaults to being a FAN_FAULT output but can be
reconfigured as an analog input reference for the THERM
input. To do this, set the FAN_FAULT/REF (Bit 7) in
Configuration Register 4 (Address 0x04) to 1.
Fault Queue
that lets the user program the number of out−of−limit
measurements allowable before generating an ALERT. The
fault queue affects only temperature measurement channels
and is only operational in SMBusALERT mode. It performs
some simple filtering, which is particularly useful at the
higher
conversions/second), where averaging is not carried out.
L (the number programmed to the fault queue) or more
consecutive out−of−limit readings are made on the same
temperature channel, the fault queue fills, and the
SMBusALERT output triggers. To fill the fault queue, one
needs L or more consecutive out of limits on the internal
temperature channel; L or more consecutive out−of−limits
on the external 1 temperature channel; or L or more
consecutive out−of−limits on the external 2 temperature
channel. The fault queue is independent of the state of the
bits in the ALERT status registers.
To reset the fault queue, do one of the following:
•
•
•
caused the SMBusALERT remains. The SMBusALERT is
reasserted if the fault queue fills up.
Table 18. Mask Register 3 (Reg. 0x0A)
Table 19. Fault Queue Address 0x06
Bit #
The FAN_FAULT output signals when one or both of the
The ADM1034 has a programmable fault queue option
There is a queue for each of the temperature channels. If
The SMBusALERT clears, even if the condition that
SMBus ARA Command
Read Status Register 1
Power−On Reset
7
6
5
4
3
2
1
0
Bits <3:0>
conversion
Name
1XXX
01XX
000X
001X
F1S
F2S
Res
Res
Res
Res
Res
FA
1 masks the ALERT for Fan 1 stalling.
1 masks the ALERT for fans at ALARM
speed.
1 masks the ALERT for Fan 2 stalling.
Reserved.
Reserved.
Reserved.
Reserved.
Reserved.
rates
Description
(16,
Fault Queue
32,
1
2
3
4
and
64