30
Rev. 0
Figure 41. Tools Menu
TOOLS MENU
The Tools menu provides access to a stand-alone TBC
Calculator and to report functions that generate C-compliant
source code for register, bit and LSB definitions.
BASIC OPERATION EXAMPLE
The following shows an example of basic configuration
and operation of LTC2949 with the GUI.
1. Enable default Layout of the GUI.
a. View
→
Reset Default Layout.
2. Connect to device from operation control.
3. Enable P2 as voltage from ADC config.
4. Click Update Configuration from Operation
Control/Misc.
5. Click Continuous from Operation Modes.
6. Enable Ch2 fast and AUX fast from Fast Channel
Control.
7. From MUX Settings set Fast to V
REF2
– GND (any
other channel is also possible, e.g., if some external
signal is applied).
8. Go to “Auto Read” menu and select.
a. Fast all.
b. Page0 Registers/Values.
c. Enable.
9. The Plot: “Fast Channel” and the “Fast Channel
Multimeter” will show the fast measurements. From
the fast channel plot context menu select “Channels”
→
“BAT…” to also enable plot of battery voltage.
10. From MUX Settings set Fast to V8 – GND (Note: V8
is one of the dual purpose pins GPIO1).
11. From the center low Element of the GUI Window select
“Register Map”, from which all registers of LTC2949
can be accessed.
12. Scroll down little bit to see the register row “OPCTRL,
FCURGPIOCTRL, FGPIOCTRL, ….”
13. Right click on FGPIOCTRL.
14. Enable GPIO1CTRL1 (all other disabled).
15. Hit Enter (from you keyboard) two times to
confirm changes.
16. The new configuration is now written to LTC2949 and
activates the toggling on GPIO1 (V8)
17. Watch the effect in the Plot: fast channel.
18. Change GPIO1 setting from register map from
FGPIOCTRL: Values can also be just entered in the
cell of FGPIOCTRL and confirmed by pressing the
enter key (Figure 47).
a. Alternate between 0, 1, 2, 3 and watch the effect
in the Plot: fast channel, Auxiliary fast channel
19. Note: Setting the GPIO control bits to 1,1 (decimal 3)
will enable the output driver to go to DVCC which can
be above the full-scale range of the ADC, depending
on the power supply voltage of AVCC, DVCC. The ADC
will just saturate to its full-scale value.
LTC2949 WINDOWS GUI USAGE
