Datasheet

AD5780 Data Sheet
Rev. E | Page 20 of 28
Table 8. Hardware Control Pins Truth Table
LDAC CLR RESET
Function
X
1
X
1
0 The AD5780 is in reset mode. The device cannot be programmed.
X
1
X
1
The AD5780 is returned to its power-on state. All registers are set to their default values.
0 0 1 The DAC register is loaded with the clearcode register value, and the output is set accordingly.
0 1 1 The output is set according to the DAC register value.
1 0 1 The DAC register is loaded with the clearcode register value, and the output is set accordingly.
1 1 The output is set according to the DAC register value.
0 1 The output remains at the clearcode register value.
1 1 The output remains set according to the DAC register value.
0 1 The output remains at the clearcode register value.
1
1
The DAC register is loaded with the clearcode register value and the output is set accordingly.
0 1 The DAC register is loaded with the clearcode register value and the output is set accordingly.
1 1 The output remains at the clearcode register value.
0 1 The output is set according to the DAC register value.
1
X is don’t care.
Table 9. DAC Register
MSB LSB
DB23 DB22 DB21 DB20 DB19 to DB2 DB1 DB0
R/
W
Register address DAC register data
R/
W
0 0 1 18 bits of data X
1
X
1
1
X is don’t care.