DS1803 Datasheet, PDF (5/11 Pages) Dallas Semiconductor – Addressable Dual Digital Potentiometer

DS1803
allows the user to write both potentiometers to the same value with one command and one data value
being issued.
All the write operations begin with a START condition. Following the START condition, the master
device will issue the control byte. The read/write bit of the control byte will be set to ‘0’for writing the
DS1803. Once the control byte has been issued and the master receives the acknowledgment from the
DS1803, the command byte is transmitted to the DS1803. As mentioned above, there exist three write
operations that can be used with the DS1803. The binary value of each write command is shown in Figure
5 and also in the Table 1.
2-WIRE COMMAND WORDS Table 1
COMMAND
Write Potentiometer-0
Write Potentiometer-1
Write Both Pots
COMMAND VALUE
101010 01
101010 10
101011 11
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