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AD7294 Datasheet(PDF) 36 Page - Analog Devices

Part # AD7294
Description  12-Bit, Multichannel, DAC/ADC Temperature Sensor and Current Sense for Monitor and Control Applications
PDF  45 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7294 Datasheet(HTML) 36 Page - Analog Devices

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AD7294
Preliminary Technical Data
Rev. PrB | Page 36 of 45
Writing a Single Byte of Data to an 8-Bit Register
The alert registers, power down register, channel sequence
register, offset registers, and the command register are 8-bit
registers; therefore, only one byte of data can be written to each.
In this operation, the master device sends a byte of data to the
slave device. To write data to the register, the command
sequence is as follows:
18. The master device asserts a start condition on SDA.
19. The master sends the 7-bit slave address followed by the
write bit (low).
20. The addressed slave device asserts ACK on SDA.
21. The master sends a register address.
22. The slave asserts ACK on SDA.
23. The master sends a data byte.
24. The slave asserts ACK on SDA.
25. The master asserts a stop condition on SDA to end the
transaction.
SD A
ACK. BY
AD7294
11
9
9
P7
P6
P5
P2
P1
P0
R/W
A0
A1
A2
A3
A4
1
SC L
1
P4
P3
19
D7
D6
D5
D2
D1
D0
D4
D3
FRAME 3
DAT A BYT E
SC L (CONTINUED )
SD A (C O NTINU E D)
ST AR T BY
MA ST ER
ACK. BY
AD7294
ACK. B Y
AD7294
ST O P BY
MA ST ER
FRA ME 1
SE RIAL BUS ADDRESS BYT E
FRAME 2
A DD RES S PO IN TER RE GIST ER BY TE
Figure 33. Single-Byte Write Sequence



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