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Demo Examples
9.3
Demo 3: Check Battery Level Mode
This demo shows how the battery level status on the TMS37157 board can be checked. High and low
level thresholds are set in the TMS37157 device, and voltages between the thresholds are considered
medium level.
•
Battery voltage
>
2.9 V
→
High voltage level
•
Battery voltage
<
2.1 V
→
Low voltage level
•
Battery voltage 2.1 V
<>
2.9 V
→
Medium voltage level
To run this demo:
1. Connect the jumper on the battery board
2. Press the Check Battery button. The TMS37157 measures the battery voltage without invoking the
MSP430.
3. The color code of the field on the right side represents the battery status:
•
Green: High voltage (see
Figure 23
)
•
Yellow: Medium voltage (see
Figure 24
)
•
Red: Low voltage (see
Figure 25
)
Figure 23. Demo 3 - Check Battery Level Mode: High
25
SLAU281B
–
November 2009
–
Revised March 2010
eZ430-TMS37157 Development Tool
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Copyright
©
2009
–
2010, Texas Instruments Incorporated
