AMC7812EVM Software Overview
Either one of these windows can be programmed with the desired DAC output voltage or hexadecimal
value. The default range upon startup is the
0 to 5 V
(0 V to 2x Vref) range. The range can be changed to
0 to 12.5 V (5x Vref) by clicking the
2x Vref
button,
. The range button now displays 5x Vref and
the program DAC value is also updated.
Figure 20. DAC Gain Button
The DAC page also has an option to use an
External
or
Internal
reference. Select this option by using a
dropdown menu, then choosing
External
or
Internal
option. When the
Internal
option is chosen, the
DAC
External Ref Value
box is grayed out. But when an
External
reference option is selected, the
DAC
External Ref Value
box becomes active and the value of the external reference voltage can be entered in
the box as shown in
Figure 21. DAC External Ref Value
To the right of the
Program DAC
field are additional options that allow the user to configure each DAC for
different events, as shown in
. Starting from left to right, the
CLR EN0/ CLR EN1
checkbox
allows the user to put the corresponding DAC in a clear state when the DAC-CLR-0 or DAC-CLR-1 pin
goes low. The
SW CLR
checkbox forces the DAC into a clear state through software.
Auto CLR
forces the
DAC to clear based on the
DAC Clear Triggers
located in the bottom of the page,
. Last is the
SLDA
checkbox, which can be enabled for synchronous load; the registers are updated by pressing the
Update DAC Latch
button.
Figure 22. DAC Clear and Latch Settings
Figure 23. DAC Clear Triggers
5.2.5
AMC7812EVM ALARMS Page
The
ALARMS
page allows the user to access or observe the AM7812 registers and register bits related to
common programmable settings and alarms of the AMC7812.
displays the
ALARMS
page of the
AMC7812EVM.
18
AMC7812EVM-PDK User’s Guide
SBAU177D – September 2010 – Revised August 2014
Copyright © 2010–2014, Texas Instruments Incorporated
