ADM1032AR ON Semiconductor, ADM1032AR Datasheet - Page 12

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ADM1032AR

Manufacturer Part Number
ADM1032AR
Description
IC TEMP MONITOR 85DEG C 8SOIC
Manufacturer
ON Semiconductor
Datasheet

Specifications of ADM1032AR

Rohs Status
RoHS non-compliant
Function
Temp Monitoring System (Sensor)
Topology
ADC, Comparator, Multiplexer, Register Bank
Sensor Type
External & Internal
Sensing Temperature
0°C ~ 100°C, External Sensor
Output Type
SMBus™
Output Alarm
Yes
Output Fan
Yes
Voltage - Supply
3 V ~ 5.5 V
Operating Temperature
0°C ~ 100°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)

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ALERT Output
measurement is detected, or if the remote temperature sensor
is open−circuit. It is an open drain and requires a pullup to
V
so that the common line goes low if one or more of the
ALERT outputs goes low.
processor, or it can be used as an SMBALERT. Slave devices
on the SMBus can not normally signal to the master that they
want to talk, but the SMBALERT function allows them to do
so.
common SMBALERT line connected to the master. When
the SMBALERT line is pulled low by one of the devices, the
following procedure occurs (see Figure 16).
DD
The ALERT output goes low whenever an out−of−limit
The ALERT output can be used as an interrupt signal to a
One or more ALERT outputs can be connected to a
. Several ALERT outputs can be wire−OR’ed together
SDATA
SDATA
SCLK
SCLK
START BY
START BY
MASTER
MASTER
SDATA
SCLK
A6
Figure 13. Writing a Register Address to the Address Pointer Register,
A6
19
1
START BY
MASTER
A5
Figure 15. Reading Data from a Previously Selected Register
A5
Figure 14. Writing to the Address Pointer Register Only
SERIAL BUS ADDRESS BYTE
SERIAL BUS ADDRESS BYTE
A4
A6
A4
1
A5
then Writing Data to the Selected Register
A3
A3
FRAME 1
FRAME 1
SERIAL BUS ADDRESS BYTE
A4
A2
A2
A3
A1
FRAME 1
A1
SDATA (CONTINUED)
http://onsemi.com
SCLK (CONTINUED)
A2
A0
A0
A1
R/W
R/W
12
ADM1032
ADM1032
ACK. BY
ACK. BY
A0
9
R/W
START
MASTER
RECEIVES
SMBALERT
1. SMBALERT is pulled low.
2. Master initiates a read operation and sends the
3. The device whose ALERT output is low responds
D7
ADM1032
D7
ACK. BY
1
1
alert response address (ARA = 0001 100). This is
a general call address that must not be used as a
specific device address.
to the alert response address and the master reads
its device address. Since the device address is
D7
1
9
D6
D6
ALERT RESPONSE
D7
D6
ADDRESS POINTER REGISTER BYTE
MASTER SENDS
1
ARA AND READ
Figure 16. Use of SMBALERT
ADDRESS
COMMAND
D5
D5
DATA BYTE FROM ADM1032
D6
D5
ADDRESS POINTER REGISTER BYTE
D4
D4
D4
D5
FRAME 2
FRAME 2
DATA BYTE
FRAME 3
D3
D3
D4
D3
RD
FRAME 2
D2
D2
D3
ACK
D2
D1
D1
DEVICE SENDS
D2
D1
ITS ADDRESS
ADDRESS
DEVICE
D0
D0
D0
D1
ADM1032
ADM1032
ADM1032
ACK. BY
ACK. BY
ACK. BY
D0
9
9
9
ADM1032
ACK. BY
ACK
NO
9
STOP BY
MASTER
STOP BY
STOP BY
MASTER
MASTER
STOP

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