DAC8718 Datasheet, PDF (50/60 Pages) Texas Instruments – Octal, 16-Bit, Low-Power, High-Voltage Output, Serial Input DIGITAL-TO-ANALOG CONVERTER

DAC8718
SBAS467A – MAY 2009 – REVISED DECEMBER 2009
www.ti.com
Monitor Register (default = 0000h).
The Monitor Register selects one of the DAC outputs, auxiliary analog inputs, reference buffer outputs, or offset
DAC outputs to be monitored through the V_MON pin. When bits [D15:D4] = '0', the monitor is disabled and V_MON is
in a Hi-Z state.
Note that if any value is written other than those specified in Table 12, the Monitor Register stores the invalid
value; however, the V_MON pin is forced into a Hi-Z state.
Table 12. Monitor Register (Default = 0000h)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3:D0
0
0
0
0
0
0
0
0
0
0
0
1
X ⁽¹⁾
V_MON CONNECTS TO
Reference buffer B output
0
0
0
0
0
0
0
0
0
0
1
0
X
Reference buffer A output
0
0
0
0
0
0
0
0
0
1
0
1
X
Offset DAC B output
0
0
0
0
0
0
0
0
0
1
1
0
X
Offset DAC A output
0
0
0
0
0
0
0
0
0
1
0
0
X
AIN-0
0
0
0
0
0
0
0
0
1
0
0
0
X
AIN-1
0
0
0
0
0
0
0
1
0
0
0
0
X
DAC-0
0
0
0
0
0
0
1
0
0
0
0
0
X
DAC-1
0
0
0
0
0
1
0
0
0
0
0
0
X
DAC-2
0
0
0
0
1
0
0
0
0
0
0
0
X
DAC-4
0
0
0
1
0
0
0
0
0
0
0
0
X
DAC-4
0
0
1
0
0
0
0
0
0
0
0
0
X
DAC-5
0
1
0
0
0
0
0
0
0
0
0
0
X
DAC-6
1
0
0
0
0
0
0
0
0
0
0
0
X
DAC-7
0
0
0
0
0
0
0
0
0
0
0
0
X
Monitor function disabled, Hi-Z (default)
(1) X = don't care.
BLANKSPACE
GPIO Register (default = E000h).
The GPIO Register determines the status of each GPIO pin.
D15
D14
D13 D12 D11 D10 D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
GPIO-2 GPIO-1 GPIO-0 X
X
X
X
X
X
X
X
X
X
X
X
X
GPIO-2:0 For write operations, the GPIO-n pin operates as an output. Writing a '1' to the GPIO-n bit sets the
GPIO-n pin to high impedance, and writing a '0' sets the GPIO-n pin to logic low. An external
pull-up resistor is required when using the GPIO-n pin as an output.
For read operations, the GPIO-n pin operates as an input. Read the GPIO-n bit to receive the
status of the corresponding GPIO-n pin. Reading a '0' indicates that the GPIO-n pin is low, and
reading a '1' indicates that the GPIO-n pin is high.
After power-on reset, or any forced hardware or software reset, all GPIO-n bits are set to '1', and
the GPIO pins are in a high impedance state.
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