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ADM1024ARUZ Arkusz danych(PDF) 10 Page - ON Semiconductor

Numer części ADM1024ARUZ
Szczegółowy opis  System Hardware Monitor with Remote Diode Thermal Sensing
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Producent  ONSEMI [ON Semiconductor]
Strona internetowa  http://www.onsemi.com
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ADM1024ARUZ Arkusz danych(HTML) 10 Page - ON Semiconductor

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ADM1024
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10
A read operation is then performed consisting of
the serial bus address, R/W bit set to 1, followed
by the data byte read from the data register. This is
shown in Figure 12.
2. If the Address Pointer Register is known to be
already at the desired address, data can be read
from the corresponding data register without first
writing to the Address Pointer Register, so
Figure 11 can be omitted.
Figure 10. Writing a Register Address to the Address Pointer Register, then Writing Data to the Selected Register
0
SCL
SDA
10
1
1
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0
D0
1
9
SCL (CONTINUED)
SDA (CONTINUED)
ACK. BY
ADM1024
ACK. BY
ADM1024
ACK. BY
ADM1024
START BY
MASTER
STOP BY
MASTER
FRAME 1
SERIAL BUS ADDRESS BYTE
FRAME 2
ADDRESS POINTER REGISTER BYTE
FRAME 3
DATA BYTE
D1
D2
D3
D4
D5
D6
D7
R/W
1
9
91
Figure 11. Writing to the Address Pointer Register Only
STOP BY
MASTER
D0
1
9
D1
D2
D3
D4
D5
D6
D7
0
SCL
SDA
1
0
1
1
A1
A0
ACK. BY
ADM1024
ACK. BY
ADM1024
START BY
MASTER
FRAME 1
SERIAL BUS ADDRESS BYTE
FRAME 2
ADDRESS POINTER REGISTER BYTE
R/W
19
Figure 12. Reading Data from a Previously Selected Register
STOP BY
MASTER
1
9
SCL
ACK. BY
ADM1024
START BY
MASTER
FRAME 1
SERIAL BUS ADDRESS BYTE
19
R/W
0
1
1
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0
0
1
SDA
NO ACK.
BY MASTER
FRAME 2
DATA BYTE FROM ADM1024
NOTES
1. Although it is possible to read a data byte from a
data register without first writing to the Address
Pointer Register, if the Address Pointer Register is
already at the correct value, it is not possible to
write data to a register without writing to the
Address Pointer Register because the first data
byte of a write is always written to the Address
Pointer Register.
2. In Figure 10 to Figure 12, the serial bus address is
shown as the default value 01011(A1)(A0), where
A1 and A0 are set by the three−state ADD pin.
Measurement Inputs
The ADM1024 has nine external measurement pins that can
be configured to perform various functions by programming
the Channel Mode Register.
Pins 13 and 14 are dedicated to temperature measurement,
while Pins 15, 16, and 19 are dedicated analog input channels.
Their function is unaffected by the Channel Mode Register.
Pins 5 and 6 can be individually programmed as analog
inputs, or as digital fan speed measurement inputs, by
programming Bits 0 and 1 of the Channel Mode Register.
Bit 3 of the Channel Mode Register configures the internal
VCC measurement range for either 3.3 V or 5.0 V.


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