Datasheet

AD5666
Rev. D | Page 26 of 28
Table 13. Clear Code Register
Clear Code Register
DB1 DB0
CR1 CR0 Clears to Code
0 0 0x0000
0 1 0x8000
1 0 0xFFFF
1 1 No operation
Table 14. 32-Bit Input Shift Register Contents for Clear Code Function
MSB LSB
DB31 to DB28 DB27 DB26 DB25 DB24 DB23 DB22 DB21 DB20 DB19 to DB2 DB1 DB0
X 0 1 0 1 X X X X X 1/0 1/0
Don’t cares Command bits (C3 to C0) Address bits (A3 to A0) Don’t cares
Clear code register
(CR1 to CR0)
Table 15.
LDAC
Overwrite Definition
Load DAC Register
LDAC
Bits (DB3 to DB0)
LDAC
Pin
LDAC
Operation
0 1/0
Determined by LDAC
pin
1 X—don’t care
DAC channels update, overrides the LDAC
pin. DAC channels see LDAC as 0.
Table 16. 32-Bit Input Shift Register Contents for
LDAC
Overwrite Function
MSB LSB
DB31
to
DB28 DB27 DB26 DB25 DB24 DB23 DB22 DB21 DB20
DB19
to
DB4 DB3 DB2 DB1 DB0
X 0 1 1 0 X X X X X DAC D DAC C DAC B DAC A
Don’t
cares
Command bits (C3 to C0) Address bits (A3 to A0)—
don’t cares
Don’t
cares
Setting
LDAC
bit to 1 override
LDAC
pin