Advantech PCI-1724U, User Manual

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37 Appendix C
C.2.3 D23~D16
Address bits D23~D20 are decoded to select on group or multiple groups
of registers.
Address bits D19~D16 select the channels. See Table C-6, C-7, C-8.
Table C.4: Register Selection
REG1 REG0 Register Selected
1 1 Normal Mode(Recommended)
1 0 Offset Mode(Used in calibration)
0 1 Gain Mode(Used in calibration)
0 0 N/A
Table C.5: DAC Normal Mode Selection (REG1 = REG0 = 1)
D23~D20 D19~D16 D15 D14 D13~D0
GX CX 1 1 DATA
Table C.6: Control Register
D23~D20 D19~D16 D15 D14 D13~D0
Group Select
Bit (GX) Channel select
Bit (CX) REG1 REG0 DAC Data Code
Table C.7: Group GX Register
Group GX D23 D22 D21 D20
GX=1 0 0 0 1
GX=2 0 0 1 0
GX=3 0 1 0 0
GX=4 1 0 0 0