Data Sheet
AD5781
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 14. Software Control Register
MSB
DB23
DB22
DB21
DB20
R/W
Register address
0
1
0
0
DB19
Reserved
DB3
DB2
DB1
Software control register data
RESET
CLR1
LSB
DB0
LDAC2
1 The CLR function has no effect if the LDAC pin is low.
2 The LDAC function has no effect if the CLR pin is low.
Table 15. Software Control Register Functions
Function 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 13) 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 AD5781 to its power-on state.
Rev. E | Page 23 of 27