ADM1034ARQZ-R7 ON Semiconductor, ADM1034ARQZ-R7 Datasheet - Page 11

• 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

ADM1034 as before, but send only the data byte containing
the register. (See Figure 18.) A read operation is then
performed, using the serial bus address and the R/W bit set
to 1, followed by the data byte read from the data register.
(See Figure 19.)
Register Addresses for Single/Block Byte Modes
and write operations. The register address determines
whether a single byte or multiple byte (block) operation is
run. For a single byte operation, the MSB of the register
address is set to 0; for a multiple byte operation, it is set to 1.
The number of bytes read in a multiple byte operation is set
Figure 17. Writing a Register Address to the Address Pointer Register, then Writing Data to the Selected Register
The ADM1034 supports single byte as well as block read
SDA
SCL
SDA
SCL
START BY
START BY
MASTER
MASTER
SDA
SCL
A6
1
A6
1
START BY
Figure 18. Writing to the Address Pointer Register Only (Send Byte)
MASTER
A5
A5
Figure 19. Reading Data from a Previously Selected Register
SERIAL BUS ADDRESS BYTE
SERIAL BUS ADDRESS BYTE
A4
A4
A6
1
A5
A3
A3
FRAME 1
FRAME 1
9
SERIAL BUS ADDRESS BYTE
A4
A2
A2
A3
FRAME 1
A1
A1
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SDA (CONTINUED)
SCL (CONTINUED)
A2
A0
A0
A1
R/W
R/W
11
ADM1034
ADM1034
ACK. BY
ACK. BY
A0
can be read from the corresponding data register without
first writing to the APR. In this case, Figure 18 can be
omitted.
determined by the state of the LOCATION pin on powerup.
in the #Bytes/Block Read Register at Address 0x00. The
number of bytes written to the ADM1034 is specified during
the block write operation. The addresses quoted in the
register map and throughout this data sheet assume single
byte operation. For multiple byte operations, set the MSB of
each register address to 1.
9
However, if the APR is already at the desired address, data
In Figure 17 to Figure 19, the serial bus address is
R/W
D7
ADM1034
D7
ACK. BY
1
1
D7
1
9
D6
D6
D7
D6
ADDRESS POINTER REGISTER BYTE
1
D5
D5
DATA BYTE FROM ADM1034
D5
D6
ADDRESS POINTER REGISTER BYTE
D4
D4
D4
D5
FRAME 2
FRAME 2
DATA BYTE
FRAME 3
D3
D3
D4
D3
FRAME 2
D2
D2
D3
D2
D1
D1
D2
D1
D0
D0
D0
D1
NO ACK. BY
ADM1034
ADM1034
ADM1034
ACK. BY
ACK. BY
9
D0
9
9
ADM1034
ACK. BY
9
STOP BY
MASTER
STOP BY
STOP BY
MASTER
MASTER