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DAC53401_V01 Datasheet(Hoja de datos) 24 Page - Texas Instruments

No. de Pieza. DAC53401_V01
Descripción  DACx3401 10-Bit and 8-Bit, Voltage-Output Digital-to-Analog Converters With Nonvolatile Memory and PMBus™ Compatible I2C Interface in Tiny 2 × 2 WSON
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Fabricante  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
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24
DAC53401, DAC43401
SLASES7 – JULY 2019
www.ti.com
Product Folder Links: DAC53401 DAC43401
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Copyright © 2019, Texas Instruments Incorporated
8.5.6
I2C Read Sequence
To read any register the following command sequence must be used:
1. Send a start or repeated start command with a slave address and the R/W bit set to 0 for writing. The device
acknowledges this event.
2. Send a command byte for the register to be read. The device acknowledges this event again.
3. Send a repeated start with the slave address and the R/W bit set to 1 for reading. The device acknowledges
this event.
4. The device writes the MSDB byte of the addressed register. The master must acknowledge this byte.
5. Finally, the device writes out the LSDB of the register.
An alternative reading method allows for reading back the value of the last register written. The sequence is a
start or repeated start with the slave address and the R/W bit set to 1, and the two bytes of the last register are
read out.
Note that it is not possible to use the broadcast address for reading.
Table 15. Read Sequence
S
MSB …
R/W
(0)
ACK
MSB …
LSB
ACK
Sr MSB …
R/W
(1)
ACK
MSB …
LSB
ACK
MSB …
LSB
ACK
ADDRESS
BYTE Address
Byte
COMMAND
BYTE
Command Byte
Sr
ADDRESS
BYTE Address
Byte
MSDB
LSDB
From Master
Slave
From Master
Slave
From Master
Slave
From Slave
Master
From Slave
Master




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