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AD7294 bảng dữ liệu(PDF) 37 Page - Analog Devices

tên linh kiện AD7294
Giải thích chi tiết về linh kiện  12-Bit, Multichannel, DAC/ADC Temperature Sensor and Current Sense for Monitor and Control Applications
PDF  45 Pages
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AD7294 bảng dữ liệu(HTML) 37 Page - Analog Devices

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Preliminary Technical Data
AD7294
Writing Two Bytes of Data to a 16-Bit Register
Both types of limit registers, the hysteresis registers, the result
register, the TSENSE result registers, the configuration register,
and the fuse registers are 16-bit registers; therefore, two bytes of
data are required to write a value to any one of these registers.
Writing two bytes of data to one of these registers consists of the
following:
1.
The master device asserts a start condition on SDA.
2.
The master sends the 7-bit slave address followed by the
write bit (low).
3.
The addressed slave device asserts ACK on SDA.
4.
The master sends a register address. The slave asserts ACK
on SDA.
5.
The master sends the first data byte
6.
The slave asserts ACK on SDA.
7.
The master sends the second data byte.
8.
The slave asserts ACK on SDA.
9.
The master asserts a stop condition on SDA to end the
transaction.
SDA
ACK. BY
AD7294
ACK. BY
AD7294
11
9
9
P7
P6
P5
P2
P1
P0
R/W
A0
A1
A2
A3
A4
0
SCL
1
P4
P3
1
99
D7
D6
D5
D2
D1/0
D0/0
D4
D3
ACK. BY
AD7294
STOP BY
MASTER
LEAST SIGNIFICANT DATA BYTE
MOST SIGNIFICANT DATA BYTE
SCL (CONTINUED)
SDA (CONTINUED)
FRAME 1
SERIAL BUS ADDRESS BYTE
START BY
MASTER
FRAME 2
ADDRESS POINTER REGISTER
1
0
00
D10
D9
D8
0
D11
ACK. BY
AD7294
Figure 34. 2-Byte Write Sequence
Rev PrB | Page 37 of 45



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