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AD7416ARMZ датащи(PDF) 16 Page - Analog Devices

номер детали AD7416ARMZ
подробное описание детали  10-Bit Digital Temperature Sensor (AD7416) and Four Single-Channel ADCs
PDF  24 Pages
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

AD7416ARMZ датащи(HTML) 16 Page - Analog Devices

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AD7416/AD7417/AD7418
Rev. I | Page 16 of 24
Reading Data From the AD7416/AD7417/AD7418
Reading data from the AD7416/AD7417/AD7418 is a single-
byte or 2-byte operation. Reading back the contents of the
configuration register is a single-byte read operation, as shown
in Figure 18, with the register address previously having been
set by a single-byte write operation to the address pointer
register.
Reading data from the temperature value register, the TOTI
setpoint or THYST setpoint register is a 2-byte operation, as
shown in Figure 19. It is also possible to read the most
significant bit of a 9-bit or 10-bit register in this manner.
Note that when reading back from the AD7416/AD7417/
AD7418, no more than three bytes of data must be read back.
A stop command must be inserted at the end of the read
communication. If a stop command is not inserted by the
master and the AD7416/AD7417/AD7418 receive more SCL
cycles than the maximum needed for three bytes of data, then
the I2C interface on the AD7416/AD7417/AD7418 pulls the
SDA line low and prevents it from going high again. To recover
the AD7416/AD7417/AD7418 interface, the part must be
powered off and on again. Reference the AN-686 Application
Note, Implementing an I2C® Reset at www.analog.com for more
information on I2C interfaces.
SCL
1
1
9
9
SDA
1
0
0
1
START BY
MASTER
ACK. BY
AD741x1
NO ACK. BY
MASTER
STOP
BY
MASTER
FRAME 2
SINGLE DATA BYTE FROM AD741x1
FRAME 1
SERIAL BUS ADDRESS BYTE
A1
D7
D6
D5
D4
D3
D2
D1
D0
A0
A2
R/W
1AD741x = AD7416/AD7417/AD7418.
Figure 18. Reading a Single Byte of Data from the Configuration Register
SCL
1
1
1
9
9
9
SDA
1
001
START BY
MASTER
ACK. BY
AD741x1
ACK. BY
MASTER
NO ACK. BY
MASTER
STOP
BY
MASTER
FRAME 2
MOST SIGNIFICANT BYTE FROM AD741x1
FRAME 3
LEAST SIGNIFICANT DATA BYTE FROM AD741x1
FRAME 1
SERIAL BUS ADDRESS BYTE
SCL (CONTINUED)
SDA (CONTINUED)
A2
A1
D15
D14
D13
D12
D11
D10
D9
D8
D6
D7
D5
D4
D3
D2
D1
D0
A0
R/W
1AD741x = AD7416/AD7417/AD7418.
Figure 19. Reading Two Bytes of Data from the TOTI Setpoint or THYST Setpoint Register



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