Datasheet

AD5780 Data Sheet
Rev. E | Page 22 of 28
Software Control Register
This is a write only register in which writing a 1 to a particular bit has the same effect as pulsing the corresponding pin low.
Table 13. Software Control Register
MSB LSB
DB23 DB22 DB21 DB20 DB19 to DB3 DB2 DB1 DB0
R/
W
Register address Software control register data
0 1 0 0 Reserved Reset CLR
1
LDAC
2
1
The CLR function has no effect when the
LDAC
pin is low.
2
The LDAC function has no effect when the
CLR
pin is low.
Table 14. Software Control Register Functions
Bit Name Description
LDAC Setting this bit to 1 updates the DAC register and consequently the DAC output.
CLR Setting this bit to 1 sets the DAC register to a user defined value (see Table 12) and updates the DAC output. The output
value depends on the DAC register coding that is being used, either binary or twos complement.
Reset Setting this bit to 1 returns the AD5780 to its power-on state.